Nv247 progressive coupler. So why it sometimes works and .

Nv247 progressive coupler. Mar 26, 2013 · You don' t disconnect the rear wheels from the front. It does not burn itself up with no load, and driving with no FRONT driveshaft will not harm it. Oct 22, 2016 · I'm thinking someone had previously put the wrong stuff, maybe ATF in there as the Mopar NV247 fluid looks mostly clear and smells closer to diff oil. It The change out. We serve dealers, rental […] Jun 5, 2013 · The NV247 Transfer Case utilizes an oil pump to circulate fluid through the unit. Did we mis anything? Please get in touch with us and tell us about it! WJ transfer cases System Case Features 1. Sounds like the progressive coupler in your transfer case is done. The VC is a sealed unit as stated and as the fluids inside break down the unit fails. 7 and bought a rebuild kit with a new progressive coupler seals and chain. I think the OP is concerned his NV247 progressive coupler is not transferring torque to the front well enough. It has a gerotor-driven hydraulically-actuated clutch pack which transfers torque to the front axle if the rear slips. Best is to remove the front prop shaft and try to turn the T case output shaft. Mar 8, 2014 · Is your jeep Quadra trac II or Quadra Drive? Then it has the NV247 T-case which has a progressive coupler for the 4 all time function. It should transfer torque to the front propeller shaft when a difference between front and rear occurs. 7L engine. May 9, 2011 · 4HI Full-Time has an open center differential while 4 LO is locked. At that point I decided to replace the entire case with a rebuilt one in fear that the progressive coupler was destroyed as well. However, your problem is with the NV247 transfer case since there seems to be little or no power going to the front differential and so neither wheel was rotating. Quadra-Drive - NV247 - On-demand; utilizes a gerotor coupling in the Quadra-Trac II transfer case and in the Vari-Lok front and rear progressive axles to send torque to the front driveshaft and/or from side-to-side within each axle when wheel slippage occurs; includes low-range (2:72:1) single-lever transfer case mode operation. & SEALS KIT. It took me 4 hours to complete in my driveway with the rear end raised off the ground with jack I think you have a problem with the progressive coupler inside the transfer case. 0L & 4. Also its normal that the rear wheels slip a bit before the front engage, because there should first be a speed difference before the progressive coupler will engage. Jul 13, 2009 · there's a tsb about this. 7L Quadra-Trac II by Powertrain Products . Also, no friction modifier should be put into the NV247; the proper Mopar NV247 lubricant is complete and needs no additive. In 4-Low, it is fully locked like any other Jeep transfer case. Change your Transfer Case fluid. Please provide us with the year, make, model, and engine size of your vehicle at checkout or contact us at 410-477-GEAR prior to ordering so that Shop For NP247 Transfer Case Parts. Apr 2, 2020 · Search this forum for NV247 Transfer case and the common issues with it. There are three variations of this unit based on year and engine size. I also found a straw to a spray can in the T case. My 4wd doesn't work, in Regular or 4lo so I know its not the progressive coupler since it should still work in 4lo with that being broken. If that doesn't work theres a good chance its your progressive coupler which is not a cheap fix and is when most people swap in a 242 transfer case. Feb 26, 2012 · Reaction time is very fast. This is the NV247, which has the progressive gerotor design (viscous coupler). So my question is; does this t-case even have a vc, and if not, what NP247 T-CASE VISCOUS COUPLER . When the progressive coupler fails in the NV247, there is no binding. Built for durability and a precise fit, ensuring optimal performance for your vehicle. Jan 30, 2012 · Then you need to confirm that it is a progressive coupler issue - shift to 4LO and see if the front axle engages. Jun 4, 2015 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. This fluid is not ATF (like ATF+4) and not gear oil — it’s a special friction-modified transfer case oil designed for the progressive coupler. In 4Hi the coupler doesn't engage the front driveshaft until the rear tires slip 3/4-1 rotation. Your Quadra-Drive 4WD system has Vari-Loc equipped differentials, and that means that there is a PC in each differential. Under normal driving conditions, the system operates conventionally, and the majority of available torque is applied to the rear wheels. (Sometimes called clutches but is actually a viscous coupler) If you put Aug 6, 2014 · I can get the chain, the progressive coupling and seals for the NV247 here in the UK. The progressive coupling contains a multi-disc clutch pack that is alternately splined to the front Jan 5, 2015 · If no drive goes to the front when the rear wheels are spinning then the progressive coupler in your NV247 transfer case has worn out. Pricey repair from what I've heard, but I dont mind having to switch into lo to get 4wd all the time. While gear driven transfer cases are more durable, they are also louder and less practical for smaller vehicles because of their weight. Are you sure it engaged in 4 Lo? I Have WJ Stuff for Sale Grand Cherokee Overland Airbag Module Clayton JK and WJ Brake Line Kit 1308101 Reply Save J JAG63 Discussion starter 81 posts · Joined 2014 #3 ·Oct 20, 2014 Dec 5, 2016 · If the front wheels pull in 4LO, then there is nothing wrong with your driveshaft. Mar 3, 2014 · For this four wheel drive system its very important that front and rear wheels wear evenly, because a diameter difference between front and rear wheels will cause a rotational speed difference between the front and rear prop shafts and will cause the progressive coupler to be activated all the time and wear the clutch away rapidly. How does it locks in low? Aug 1, 2018 · How is the tire wear difference front to back? If there is a reasonable difference, the progressive coupler inside the T-case will be activated and cause problems you discribed. The progressive coupler goes bad and I think that's what happened to mine. 249 is 10/90 torque bias when there's no wheelslip. Hopefully the progressive coupler in the TC isn't ruined. Reading some stickies I came across this: Transfer Case Models with QuadraDrive and Quadra-Trac Sep 18, 2014 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. If the PC is bad, you have three options: replace the progressive coupler, replace the whole case with a used transfer case, or swap in the NV242 case from a SelecTrac model. Jan 7, 2009 · The 247 has a PC (Progressive Coupler) which does not fail in the same manner as the 249. Jul 7, 2014 · This page last updated: July 7, 2014 WJ Four-Wheel Drive Systems Apr 7, 2016 · NV247 has a "progressive coupler": RWD except if there is slipping -- nice. Aug 22, 2018 · The differentials on your jeep will need friction modifier, or the diffs will lock up when making tight turns and the wheels will start skipping. Feb 24, 2012 · To test the transfer case, put it into 4LO. If the binding is in the TC, changing the fluid again using the Mopar NV247 lube should help. When you put it in 4lo you lock 4x4 which I believe bypasses the coupler. " W. Instead, most opt to swap in a Selec-Trac 242 case which is a more traditional design. Jul 31, 2009 · A 247 tcase has a set of clutches in the progressive coupler that require a specific modifier in the fluid. Sep 9, 2012 · Power first goes through the transfer case and gets split to the front and rear axles, (50/50 locked together in 4low, otherwise the progressive coupler splits power based on slippage in 4 high). '97 zj 5. I'm wanting to snatch the front driveshaft out to stop the binding. Jun 20, 2009 · Problem could be a worn progressive coupler in the TC, or it could be the wrong lubricant in the TC. But I'm thinking I need to replace my hub bearings as well. May 12, 2012 · Quadra-Drive NV247 On-demand; utilizes a gerotor coupling in the Quadra-Trac II transfer case and in the Vari-Lok front and rear progressive axles to send torque to the front driveshaft and/or from side-to-side within each axle when wheel slippage occurs; includes low-range (2:72:1) single-lever transfer case mode operation. In the sealed unit there is an oil pump that pressures up a pack of clutch discs. I've rebuilt my 249 and you can read about it in my build thread. S. Jan 12, 2011 · The problem was solved in the 247 with what they called a "progressive coupler". Oct 17, 2012 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. Jan 31, 2009 · I need a little help in figuring out my best course. Detailed repair manual for the 1999 Jeep Grand Cherokee 4WD L6-4. The "all wheel drive" is not an actual function from a full time perspective. Feb 23, 2015 · Quite comon for the 247 that the progressive coupler stops working, but it should still work in 4 Lo. It plays a vital role in the efficient transfer of power and torque between the drivetrain components. "There's nothing so absurd that if you repeat it often enough, people will believe it. You can identify this transfer case by the tag on the back of the rear case half that says NP247J . Dec 19, 2009 · The NV247 is an on-demand 4-wheel drive transfer case with two operating ranges and a neutral position. Unfortunately, if the progressive coupler in the NV247 is bad, it would also feel like a 2WD. J. I read somewhere that Detroit had a bad run on D30 true trac's that stuck in the "lock" position. Another option that takes a little more ingenuity is to replace the transfer case with the NV242 from a SelecTrac model - this usually entails tinkering with driveshafts and the shift Aug 20, 2025 · (Sometimes called clutches but is actually a viscous coupler) If you put the wrong fluid (like ATF) in it, the progressive coupler won’t work correctly, which can cause binding, chatter, or premature wear and failure. 5–2 quarts (fill until fluid comes out of the fill plug). Apr 3, 2016 · NV247 has a "progressive coupler": RWD except if there is slipping -- nice. Jan 27, 2007 · if that doesnt help your progressive coupler is shot. Nov 9, 2006 · how often do the progressive couplers go out? im looking at an 02 limited with quadradrive this weekend and if its something thats a big problem like the viscous coupler on the 5. HOWEVER! The NV247 is not bad either. Its full automatic four wheel drive. When it fails, you do lose the possibility of torque transfer to the front drive shaft. 25457/TSK-247 You can identify this transfer case by the tag on the back of the rear case half that says NP247J. QuadraDrive was marketed as the top-of-the-line system in the WJ but for certain folks, it is the least desirable. Operating ranges are 4-high and 4-low. Jan 4, 2018 · The 247 has a progressive coupler, the difference being power is not transmitted through a fluid in the 247, it is transmitted through a clutch pack. May 31, 2015 · But quadra drive uses the NV247 T-case and that one is known to give problems with the progressive coupler inside the T-case. To contact me, email [email protected]Frobot Fabrication Facebook 01 WJ 5 Speed Claytons LA's, 36" Iroks, 35 spline 9" rear, Custom Ruffstuff 60-9" front axle. It requires a special fluid available only at the dealership (Mopar NV247 transfer case lube). Failure to do so may cause premature failure of the Progressive Coupling. Jan 29, 2018 · The progressive coupler in the NP247 transfer case is a hydraulic device and thus is dependent on a proper level of lube in the case, AND that it has the correct type of lube. Dec 11, 2010 · Quadra-trac gives you the NV247 transfer case. Many times this coupler is not working anymore. Aug 8, 2003 · WJ: NV247 to NV231 swap complete: writeup Jump to Latest 20K views 2 replies 3 participants last post by grin Oct 15, 2010 A Motive Gear 5012329AA NV247 VISCOUS COUPLER Manufacturer Part Number 5012329AA ★★★★★ Dec 11, 2012 · The 4x4 for quadra trac or quadra drive is taken care of by the same T-case, the NV247. Most service documentation lists ATF+4 as the correct fluid for it, but this is incorrect and Chrysler published a TSB about it. Feb 12, 2024 · I recently picked up a 2002 Limited at auction that had the transfer case blown in half. There are progressive couplers, which are an entirely different thing. In fact, many of the older Jeeps are still on (and Dec 18, 2012 · I recently bought a 2000 Grand Cherokee with the NV247 T-case. Jan 2, 2014 · My 99wj 4. But, "stiffness" is kind of subjective and what you feel is probably just a "Jeep Thing" that most of us do not notice. These range from basic part-time systems that require the driver to move a control lever to send power to four wheels, to permanent four-wheel systems that monitor and sense traction needs at all four wheels automatically under all conditions. Sent from my SAMSUNG-SGH-I317 using Tapatalk Apr 14, 2012 · Swapping the complete transfer case with another NV247 is the easiest fix. Is the 247 the same? Is it possible to replace the progressive coupler Jan 3, 2015 · no, definitely not recommended go to dealer, get MOPAR brand NV247 fluid about $25 a bottle FYI - the 247 uses a viscous coupler for full-time AWD, the function and longevity are both based on the quality of the fluid in the transfer case. Only Mopar Transfer Case Fluid should be used. Oct 5, 2009 · The NV247 (QTII and QD) uses a gerotor pump/clutch pack system (called a progressive coupler or simply PC)) very similar to the system used in the Vari-Loc differentials. The progressive coupler needs clean oil . Whether I go forward or reverse on the street, it feels like it's in 4WD. I bought it knowing about the issue and because it was $1300 cheaper and in better shape than any of the others I bought it (other than this issue). I would also recomend making sure the diffs have fresh oil also . 9 im not sure if i want it. The progressive coupling inside the T-case will be automatically activated if there is a speed difference between the front and rear propeller shaft, transferring torque to the front wheels. If its toast, the 4 all time doesn´t work anymore, but the 4Lo continues to work, because then its a direct coupling without the use of the progressive coupler. 7 has a locked up progressive coupler causing binding from front to rear. Now, you could do one of three things: 1. I never red anything about why it happens, but to me the problem is the difference in tire wear front to back. If some lubricant other than the Mopar NV247 lube has been used in the TC, it might be worthwhile draining out that lubricant and replacing it with the special Mopar lube. Save Share Reply Quote Like Double E 7376 posts · Joined 2003 #3 ·Apr 2, 2020 Jul 30, 2018 · Yes, in 4lo the progressive coupler is not in play and it operates as any other case in 4lo would, and as far as I know the Tru Trac will work fine with the 247. Jan 26, 2014 · So a have Quadra Trac II with the NV247 TC. Jun 15, 2008 · There is a progressive coupler in the 247 though that can see trouble if the fluid was not changed properly and can keep it from engaging the automatic 4wd upon slippage. The best way to improve fuel economy in a brick on wheels is to not drive it at all, or drive it sparingly. It's not a difficult Feb 17, 2015 · A 247 T case works like this. STATES & PUERTO RICO! Home » Jeep Driveline » Transfer Case » Crown Automotive Progressive Coupling Get the Best Performance with Crown Automotive Transfer case Progressive Coupling for 1999-2004 WJ Grand Cherokee & 2001-2004 WG Grand Cherokee w/ NV247 5012329AA parts at JEGS. How to change the Viscous Coupling on N P 247 part 2 Jun 4, 2013 · A few things about quadra drive: You have two critical components that fully operate the system (1) the transfer case progressive coupler which engages it detects the rear wheels spinning, and (2) the vari-lok differentials (clutch based limited slip) in both front and rear that detect wheel spin between tires on the same axle. Instead of the super-fast progressive coupler that the WJ uses, they used a much slower and less-reliable viscous coupler. ) Will need to replace or rebuild it. a set of orifices and valves direct fluid to the coupler to determine how much torque is sent to which set of wheels Mar 18, 2020 · Welcome to the garage. I'm guessing that if the oil pump o-ring is leaking, then you would get some erratic behavior from the progressive coupling. Change the fluid with Mopar transfer case fluid. Do all the tires spin? if not, the progressive coupler is not engaging. It made a big difference in mine. the dexIII will cause clutch chatter in the progressive coupler and will lead to premature failure. Yes, the front output will spin on a 247 with the front driveshaft removed, as the progressive coupler is engaging immediately. I opted to do the NP242j swap. Quadradrive 1 might be one of the best 4wd systems mass produced, and certainly the most underrated. I have cut open and dismantled the viscou Apr 16, 2009 · the 247 doesn't have a viscous coupler, it's a progressive coupler. Motive Gear 5012329AA NV247 VISCOUS COUPLER Order now for same-day shipping on eligible purchases from FinditParts. It operated pretty well the same but is not contained separate, and uses the same fluid with the rest of the case. The 2015 Jeep Cherokee is the worst car I've ever owned. So why it sometimes works and NV247 Progressive Coupling Installation Tips Replaces P/N: 5012329AA We recommend that you use the original Mopar transfer case fluid (P/N: 5016796AA) with this Progressive Coupling. (cheap $20. Dec 26, 2010 · If the QT2 transfer case (NV247) is working properly it should feel very much like a 2WD. a failing chain will skip/pop/grind and make all other manner of unholy noises when the 4wd engages. Is it worth replacing that by itself or should I be looking for a coupler/chain kit, or even a whole new T Dec 12, 2010 · The QuadraTrac II system has an NV247 transfer case using a progressive coupler to transfer torque to the front when it mechanically detects wheel slip. 247 progressive coupler isn't much different from that actually. Click to expand Just look up "NV247 progressive coupler" you should get plenty of results. Very expensive part, so you better look for a junkyard 247, or swap to the 242, which gives you the option to select 4 hi. Instead, they use what they call a "progressive coupler" that uses hydraulics and clutches to engage the front axle, but only when the rear driveshaft starts to rotate faster than the front driveshaft. Mar 28, 2012 · However, we have the gerotor-driven progressive coupler, whose practical advantage is long term use with little to no wear. com, America's online marketplace for heavy duty parts. I doubt that Dexron 3 can be used in the T-case. Nov 21, 2012 · My first thought was the progressive coupler but im not so sure. Nov 22, 2010 · I opened up the T case and found the teflon ring on the shifting fork was destroyed. Capacity: about 1. Dec 19, 2010 · It also uses a traditional center differential instead of the progressive coupler in the N247. Jan 17, 2012 · The transfer case is probably shot. There are a ton of threads on how to do the NV242 swap. I liked his tone much better in this response. Jan 11, 2008 · 4. Sep 15, 2013 · I read that the low should still work even if the progressive coupler is bad, but it doesn't work in hi or low. May 13, 2020 · X2 definitely take a look at the transfercase fluid condition. It probably will lubricate the T-case, but the special fluid is there to prevent clutch chatter inside the progressive coupler. Quadra-Trac I NV147 On-demand; utilizes a gerotor coupling for improved response; high-range only (does not include neutral or low-range positions). For a wealth of WJ info, check out www. Jan 26, 2012 · Replacing Progressive Coupler on a 247 Jump to Latest 7. These are things I learned while at the shop as they rebuilt my 247 transfer case. I've snapped them more than once without damaging the boot at all. Replace your progressive coupler (not so cheap @ $700, because you might as well replace the chain as well) 3. It happens when turning in both directions. The NV uses a progressive friction coupler and a chain, where as the NP found in the 98 and older models uses a viscous coupler and a chain. The strength of the coupling of the drive shafts or axle shafts is determined by the difference between the rotation speeds of the two shafts involved. In the NV247, the strength of the coupling, that is, the pressure on the clutch pack produced by the gerotor pump, depends of the difference between the front and rear drive shaft speeds. This is common knowledge. Jan 2, 2013 · Your progressive coupler likely has gone out in the transfer case. Typically the problem with 247 T cases is the progressive coupler clutches wear out then the front wheels are not powered in 4 hi. This is a new Progressive Coupling for a New Process 247J Transfer Case that comes in a 1999-2004 Jeep Grand Cherokee. Jan 30, 2016 · If not the progressive coupler in the transfer case that powers the front driveline may have worn out, this is a very common problem. If it doesn't work after that you will need to replace the coupler. The differentials in both axles also use hydraulic pressure to apply the clutch packs for limited slip, and they are extremely prone to worn-out fluid or dirt and contamination from off-road use. I was wondering before I go any further if anyone knows if you can swap the NV247 out for a NV231 system out of a 2000 Durango. use only 247 fluid. It uses a progressive coupler for 4-Full Time and a mechanical chain drive in 4-Lo, which is why your 4-Lo still works. Gear driven transfer cases use a set of gears to send power to the front and rear axle. The way the TC coupler works in my Quada Trac II is the rear wheels drive as the primary mover. I haven't come across the situation where I've needed a locked transfer case in 4HI but I can see where people would want more control. They grind on turns when they are shot. Feb 20, 2010 · People sometimes forget what "progressive" coupler means. Those tab indents near the main shaft prevent the pump from spinning and are similar to the gas version. e. I have a NP247j TC, so I thought the progressive coupler would not Sep 2, 2011 · I opened up my np247 transfer case (from 99 JGC limited with 4. Fluid has nothing to do with the nv247 other then to lube it. The 247 used a special type of progressive coupler for it's AWD capability, and is therefore quite picky when it comes to which fluid. It has approximately 120k miles on it. im thinking bad bearing? worn chain? May 14, 2012 · The progressive coupler in the 247 doesn't bind when it fails like the viscous couplers do in the 249. Jeep uses a variety of four-wheel drive systems on their vehicles. 4LO bypasses the progressive coupler and locks the transfer case. Personally, I've never had any trouble with my NV247 with the auto-engaging progressive coupler in the center diff. Jan 8, 2013 · Unfortunately, if the TC is not working more or less correctly after that, it just may be that the progressive coupler is shot. Feb 27, 2013 · Right, it's all your fault because you did or didn't do something bad with the fluid Assuming you have quadra trac 2 or quadra drive and the 247 case, your progressive coupler might be shot. That probably helped as well. 0L VIN S. in order for the progressive coupler in the NV247 exert a large torque on the front drive shaft, which may be necessary if the front wheels have decent traction, the rear drive The NV247 found in WJs instead use a progressive coupler, powered by gerotors. Oct 13, 2024 · The Jeep is just as capable in high range using the NV247 progressive coupler as it is in low range mechanically locked. Use the Mopar NV247 transfer case fluid AS IS. When the 247 fails, it defaults to 2wd. Or will that be a waste of money? If I do change the coupling and chain, is anything else in the TC likely to go? Can I change the chain and coupling with the TC still on the car? Has anyone had a similar experience? Mar 30, 2010 · The older 249s do, but the 247s use a geroter pump and a progressive coupler. The Progressive Coupling can fail if the fluid breaks down and is not changed, or if the fluid level drops. Nov 13, 2009 · oldfamilyguy is right about a failing progressive coupler not causing chatter or binding. Jul 18, 2008 · Okay so my problem is this. I'm about to fork out the money for some good snow tires but still wondering where the power at the front wheels is. I put it all back together and the 4WD still doesn't work? Any ideas here? Apr 19, 2011 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. best regards Mar 10, 2009 · Hey guys, I just recently began hearing the typical groaning noise that is caused by a bad progressive coupling in the NV247. In that situation all you have is rear wheel drive. The VC was used on the 249 though, and was replaced by a PC (progressive coupler) in the 247. Sadly, it's a common problem with the NV247 when fluid changes are overlooked (or the Jan 5, 2015 · Your suspicion is correct; there is clutch chatter in the progressive coupler (gerotor pump/clutch pack system). Now my guess is that my NV247 t-case is the culprit of this noise. But, now that I have it all apart, would you suggest replacing the progressive coupling with these replacement parts? This is a New Progressive Coupling for a New Process 247J Transfer Case that comes in a 1999-2004 Jeep Grand Cherokee With the Transfer Case Gasket and Seal kit. Either way, they are expensive but simple to replace. 00. com for tons and tons of information. I highly doubt that the PC is bad however because unlike the VC in the 249, when the PC fails you only have 2wd. Oct 3, 2011 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. May 30, 2012 · You need to look for something else as the cause instead of the NV247. In low range it's mechanically locked, but in high, power is transmitted through the coupler. For both quadra tracII and quadra drive its very important that the tire wear all around is kept the same as much as possible, or the progressive coupler inside the T-case will wear out rapidly. The oil pump on my NV247 wasn't a tight fit either. Jan 22, 2013 · Join Date: Aug 2009 Posts: 2137 Share #1 NP247 or NV247 Transfer Case Rebuild 22-01-2013, 08:59 PM New Venture transfer case numbering system: First number = number of speeds/gear ratios Second number = Case strength, 2 is smallest and 7 is largest Third = 4WD/AWD type: 1 = Part Time (PT); 2 = PT + Full Time (FT), manual shifts; 3 = PT, electric shifts; 4 = PT + FT, electric shifts; 5 = 2005 & up Jeep Grand Cherokee with Hemi; 6 = Active on demand system; 7 = Active on demand system with Apr 5, 2008 · removing front drive shaft from a 2000 jeep grand cherokee Will it hurt for me to drive my jeep with the front drive shaft removed? My transfer case needs to be replaced, but need to save up some money before I can afford to replace it. put the jeep on Mar 18, 2015 · Welcome to the garage. It can go in the NV242, but not the ones with the progressive coupler, like in the 247. NV247 Progressive Coupling Installation Tips Replaces P/N: 5012329AA We recommend that you use the original Mopar transfer case fluid (P/N: 5016796AA) with this Progressive Coupling. Is the progressive coupler shot or should I try a fluid change again? Jan 29, 2013 · progressive coupler in transfer case. The pump rotor and case are driven by the front and rear driveshafts respectively, and deliver pressurized oil flow to the coupling in proportion to their speed difference. Mar 13, 2013 · "The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. If the fluid is old or the wrong fluid, it will not behave correctly. Unfortunately, the one-wheel-peel is the expected behavior of the system if the transfer case isn't working. Most of the 4wd use was in snow in Colorado. When in hi range 247 T cases drive the front wheels with a unit (progressive coupler) that works like a limited slip. Though Oct 13, 2012 · New WJ. Only took 10 minutes to do the job. What condition are the front tires? Jan 12, 2009 · Apparently the NV247 is problematic/finnicky with fluid and my guess is the previous owner either never changed it or replaced it with the wrong fluid. Aug 21, 2013 · I can't tell from the description, but if the jeep spins the front wheels in 4Lo, but unsure in 4Hi AND the front wheels spin properly by hand, I would imagine the progressive coupler is toast in the transfer case (NV247). When I need it locked, I'm in 4LO. The 249 is not the same as the 247. I am wondering if I might get away with changing just the chain. Then it becomes 4wd and possibly front 2wd if the rear wheels have no traction. Ive also changed the fluid with the Mopar stuff a few weeks ago and hadnt noticed a difference. As for the trans (545RFE), I've had Amsoil Universal Synthetic ATF in mine for about 50K miles and it runs fine. I thought those made only groaned when turning which is something i have not noticed, the noise sort of cuts in and out for a few seconds after i get off the throttle and then goes away this is in straight line driving. rasie jeep completely off the ground. Transfer Case Viscous Coupling 1999-2004 WJ Grand Cherokee, WG (Europe) Grand Cherokee; w/ NV247 Transfer Case; Includes Progressive Coupling, Seals, and Chain With over 9,000 different parts in stock for Jeep® vehicles from 1942 on up, Crown has the largest stock of replacement parts for Jeep® vehicles, including factory-discontinued parts. Oct 4, 2023 · Viton O-rings are available on-line in just about every size. When the the 247 fails, it fails to 2wd (rear wheel drive only) Aug 26, 2009 · Sounds like something is terribly wrong but not sure what because mostly ive heard that everyone is having symptoms when turning. Its intricate construction consists of multiple friction discs that engage and disengage in response to the vehicle’s needs. Fluid was last changed about 15k ago. I think I would describe it as the normal feeling that 4wd would give when driving on pavement. com in-depth page of WJ Generation Jeep Grand Cherokee four wheel drive system. I wonder what the T-case fluid would do in this case, or the bump should come from the progressive coupler inside the T-case which activates, but still don´t see the relation. Sep 1, 2004 · The progressive-coupling bias system has a faster response than viscous couplings and can be cooled for thermal protection. May 23, 2011 · The 05016796AB lubricant is just ATF+4. The 247 doesnt use solenoids but oil pressure from a gerotor pumps driven by the front and rear driveshafts to a progressive coupler. It may go into the ZJ with some adaptations -- like the tailcone. You might try to drain the fluid in transfer case first and replace it the the proper fluid for quadradrive transfer case from your jeep dealer only. Oct 28, 2008 · The 247 (WJ) uses a Progressive Coupling/Coupler, where the 249 (ZJ) uses a Viscous Coupling/Coupler. I buy a friggen 4x4 at the start of the winter and I'm stuck with 2wd. Feb 24, 2012 · I'm embarassed that I can't actually tell whether it's my progressive coupler gone bad in the transfer case or if my front Detroit True Trac is binding. This is the Quadra-Trac unit with progressive coupler. There are occasional issues with the 242 not shifting correctly. It's a very reliable transfercase, as the progressive coupler is an open design, allowing oil to penetrate all the way through. The progressive coupler allows the transfer case to react as fast as 40 milliseconds. Almost certain it is the transfer case, and it only happens when the vehicle is warmed up. Was the shudder still present after removing the front propeller shaft? Dec 10, 2012 · This was similar to the WJ's QuadraTrac II in that it was an all-time, pavement friendly 4WD system. Yes, you are right! However, "progressive coupler" means nothing. (also used on quadra tracII). Dec 7, 2016 · steve_80 said: and it's a Progressive Coupler? I've found Vicious Couplers, but no progressive. Jan 17, 2013 · Progressive coupler in the transfer case is likely shot. I have a 99 limited 4. Ghey. Similiar idea, except the progressive coupler is open and uses the fluid in the transfer case. When in 4-low, it bypasses the coupler and mechanically locks the front and rear driveshafts together so that they get equal torque all the time. - Allstate Gear Is A Great Source For All Your New Process Transfer Case Parts Requirements. I picked up a replacement NV247 for it, swapped it in, and yes I am using the MOPAR specific fluid, not ATF4. Jul 7, 2014 · The gerotor pump/clutch pack system (in NV247 and Vari-Lok differential) is called a progressive coupler. Many have reported improvements in the function of 4wd after a fresh fluid change. Explore Products TAG’s Reputation is built to Last Since 2005, TAG Manufacturing has led the industry in durable, quality, reliable attachments for excavators, backhoes, wheel loaders and other heavy construction equipment. Feb 23, 2011 · Well you could start by swapping the fluid and see if that helps, some people report good results from just putting fresh Mopar NV247 fluid in it. They are supposed to have a fluid change about every 24000 miles. wjjeeps. So they switched to the 247 fluid. Oct 19, 2014 · Normally these just wear out the progressive coupler which means you will not have 4 high, but still have 4 lo. The transfer case requires a specific type of fluid, made for wet clutches in hydraulic tractor systems, and sold by Mopar for use in the 247 t-case. Click to expand Jan 18, 2018 · It could also be coming from the progressive coupler inside the transfer case, or even the Varilok in the front axle. This operation is due to a progressive coupler in the TC, and there is no viscous coupler involved at all. A set of orifices and valves control the speed-differ- ential starting point and rate of torque transfer rise in the clutch. The driveshafts transfer the noise pretty well and make it hard to locate. Call Us Today! Jan 4, 2011 · The NV247 transfer case can fail in the progressive coupler, leaving you with RWD, N, and 4LO. with jeep in all wheel drive, put trans in forward gear. If it rotates freely, then most probably the chain is the problem. The cheapest rebuilt I could find was $795 plus core. It still worked well when I parked the jeep to work on it as a project vehicle. Its basically full rear wheel drive until it detects slip and in fractions of fractions of a second it will put power to the front wheels with a hydraulically powered gerator pump and some clutches. Feb 25, 2010 · No Viscous coupler in the 247. The OEM number for this progressive coupling is 5012329AA. The problem can be with the chain inside the T case, or a problem in the front diff. NP247 Transfer Case for 2001-2004 Jeep Grand Cherokee 4. Jun 19, 2012 · No "full-time 4WD" option though like the NV242 or NV247. I found an internal Chrysler case about a very similar issue. When the WJ debuted in '99, the NV247 was filled with ATF+4, but due to the problems they encountered with the clutch chatter, they looked into other fluids. FREE SHIPPING TO ALL 50 U. If you do not use the proper fluid in these cases, it WILL trash the clutches. This will be indicative of 4LO working but 4 All Time not engaging or putting power to front wheels. Oct 8, 2024 · The nv247 progressive coupling multi-disc clutch pack is designed to seamlessly transfer torque between the front and rear wheels, ensuring optimal performance and handling. OEM quality, backed by the industry's best warranty. Got a rebuilt one for 862. Cool to see it done. In 4 low the progressive coupler is locked so it can not slip. Oct 8, 2024 · The nv247 progressive coupling, also known as the 5012329aa multi-disc clutch pack, is a crucial component in the field of automotive technology. So the progressive coupler in the T case will still lock the front wheels to the rear when you turn them with different speeds. Sounds like the progressive coupler is locked up in there. Get an insurance quote in minutes from a top-rated company. . The 249 tcase has one of those, that isn't what you need. Remember than in 1999, DC originally specced ATF for all WJ transfer cases but quickly realized binding was occuring in the NV247, issued a TSB about it, and released a specialized and more expensive fluid that allows the progressive coupler to function correctly. The fix is to drain the NV247 and refill with Mopar NV247 lube obtained from a Chrysler/Jeep dealership. Sep 23, 2008 · If it's a Limited with the V8 it most likely has a 247, which has a progressive coupler which isn't sealed and is less prone the failure than the VC in the 249. The progressive does just about the opposite and eliminates the front wheel drive function. A progressive coupler can be a friction material clutch, gear driven, a viscous coupler, and so Detailed repair manual for the 1999 Jeep Truck Grand Cherokee 4WD L6-4. I'm replacing the one in mine right now. 2nd gen. Find 24/7 support and insurance for you, your family, and your belongings. It's pretty much the same operation as the Vari-lok diffs. This transfer case has more particular maintenance requirements (special fluid) and the progressive coupler can fail if not maintained, leaving you with RWD only. Mar 19, 2008 · Since your NV247 transfer case has a progressive coupler it adjusts the torque front to rear, kind of like a limited slip for a t-case, so your progressive coupler sends power front to back and the LSDs send it side to side so most of the power will go where you have traction granted everything is working correctly. Shop Now at the Guaranteed Lowest Price! This is a new Progressive Coupling for a New Process 247J Transfer Case that comes in a 1999-2004 Jeep Grand Cherokee. It is what makes it possible to be in full-time 4WD. Oct 9, 2016 · Technically, your NV247 has a progressive coupler (PC) not a viscous coupler or VC. check out this for more info Jeep Grand Cherokee WJ - WJ Four-Wheel Drive Systems When properly cared for the 247 is a solid case. If the fluid is dirty or low, and the friction modifier is used up, the coupler wont work as designed. So I had my nephew remove my front drive shaft so I can temporarily drive it while I save to get the transfer case replaced. Mar 21, 2017 · Its called in fact an on demand 4 wheel drive system. Apr 25, 2009 · I have a 2002 JGC limited and I have had binding issues when making sharp turns. Jan 27, 2012 · I don't have any experience with this, but I'm pretty sure that replacing the progressive coupler involves removing the TC and tearing it apart. When I look at the FSM on page 21-344, it doesn't really show it but does mention it. Mobil 424 was found to do the job well Dec 26, 2010 · Unfortunately, if the progressive coupler in the NV247 is bad, it would also feel like a 2WD. Good chance this will make the AWD operable again . Aug 18, 2017 · I think if you have Quadratrac II or Quadradrive, the nv247 transfer case (i. Oct 19, 2016 · Two things: 1) There are no viscous couplers in any WJ drivelines. The progressive coupling contains a multi-disc clutch pack that is alternately splined to the front and rear driveshafts, and controls torque variation between the front and rear driveshafts as dictated by the pump. Feb 4, 2010 · The above is a test of the Vari-Lok differentials. Vehicles with Quadra-Trac II or Quadra-Drive full-time 4WD: TSB – Vehicles equipped with the NV247 transfer case (which are all vehicles with the aforementioned 4WD systems) are prone to issues with the progressive coupler related to the transfer case fluid. what are the symptoms of a bad progressive coupler? and is there any way to know without tearing the tcase apart? Sep 4, 2008 · There is also a slight chance you can harm your progressive coupler/transfer case. Any ideas? Feb 23, 2012 · Rebuild kit is $580 and a new rebuilt case is $800, Progressive coupler is what usually goes out in them, Myself I probably wouldn't attempt it I mean unless you know what your doing. progressive coupler) will detect different wheel speeds between front and rear when the front DS is disconnected, thereby engaging 4wd and probably not for the better. Proudly made in Tennessee since 2005. Window regulators fail somewhat regularly. TC is NV247 w/ progressive coupler incase anyone was wondering. Oct 17, 2016 · Possibly because the previous generation of grand Cherokee, the ZJ had a Viscous Coupler that did fail that way, and which is often confused with a Progressive Coupler, even though they are very different. I saw a video of coupler replacement on a 242, and that coupler was replaced by only removing the tail section of the transfer case. If the coupler did not engage and lock the F/R outputs, the vehicle wouldn't move at all. is my nv247 TC toast? Help! I bought a 99 V8 4x4 quadratrac II (have owned a 99 V8 quadradrive in the past). So, your other fluid may work for awhile, but chances are, its going to fail sooner than later just like Chrysler realized with ATF. 50/qt (you need 2). A set of orifices and valves control the speed-differential starting point and rate of torque transfer rise in the clutch. After some diagnosing I have found that the progressive coupler is not working. Aug 22, 2010 · 1. Excavator Buckets, Couplers & Attachments that get the job done. I would jack up your front axle and turn the wheel to the left and spin the wheels to see if Welcome to the JeepSpecs. Mar 23, 2012 · This will make the transfer case less effective and allow more slippage of the clutches in the progressive coupler. "I understand and agree with what you are saying. Aug 21, 2023 · Save Share Reply Quote Like 0Reply mak_v8 1334 posts · Joined 2016 #7 ·Aug 23, 2023 Yes @toku58 , what you said about the 242 is correct 👍 As you said, it is probably a matter of terminology: I used to call viscous coupler a coupler in which an oil temperature sensitive “creates” friction between discs (an example is the Ferguson coupler); what is present in the 247 is a clutch pack Jan 21, 2018 · A viscous coupler when it fails will lock itself in 4x4 but since the NV247 transfer case has a progressive coupler, those tend to fail by not transferring power to the front as in they wear out like worn out clutches. Mar 13, 2018 · Also, WJ's with the NP-247 don't have a viscous coupler in the transfer case. Mar 10, 2013 · OP if you have the v8 now, you will probably want to keep a v8, espescially jn the WJ which weighs more the extra power is nice, most come with Quadratrac which has a progressive coupler that delivers power to front or rear depending on conditions. Oct 20, 2020 · Shop high-quality remanufactured NP247 Jeep transfer cases at Midwest Transmission Center. Adding the FM will make the clutch pack slip excessively leaving you GENERAL INFORMATION NV247 TRANSFER CASE OPERATION The NV247 NV247 Transfer Case is an on-demand 4-wheel drive transfer case with two operating ranges and a neutral position. Jan 31, 2012 · Actually, binding indicates a probably healthy progressive coupler that only needs the correct Mopar NV247 lubricant. Chain driven transfer cases use a chain in place of a gear set. As the coupler sensing slippage it moves drive to the front wheels. The NV 247 transfer case utilizes a progressive coupling which is supplied with pressurized oil by a gerotor style pump. Jan 25, 2012 · They realized after extensive testing that ATF was not strong enoughnothing else was strong enough for the progressive coupler. The NV247 TC requires a special lubricant obtained at a Jeep dealership. Feb 19, 2006 · Progressive Coupler = Viscous Coupler 1998 ZJ - 36's & bent unibody - RIP 2004 WJ - Expedition build 2011 A4 - DD Reply Quote Like BlaineWasHere 15037 posts · Joined 2004 #6 ·Feb 19, 2006 PumaZJ said: Progressive Coupler = Viscous Coupler Nov 10, 2012 · Registered Joined Apr 1, 2012 · 147 Posts Discussion Starter· #3 ·Nov 11, 2012 What is the proper term for "Progressive Coupler"? is it the vicious coupling ConkaTonk 04WJSE Reply Quote Oct 8, 2012 · DO NOT PUT ATF+4 IN THAT TRANSFER CASE. Jun 20, 2012 · Did you change the NV247 T-case fluid with ATF+4? The ATF+4 was in the beginning used in this T-case, but already somewhere in 2000 they changed it for some fancy MOPAR fluid (in fact just MOBIL 424), because the ATF+4 was causing shudder in the progressive coupler inside the T-case. Most service documentation lists ATF+4 as the correct fluid for it, but this is incorrect and Chrysler published a TSB about it in 2000. I have seen several threads about it on here NV247 Progressive Coupling Installation Tips Replaces P/N: 5012329AA We recommend that you use the original Mopar transfer case fluid (P/N: 5016796AA) with this Progressive Coupling. Quadra-Trac II NV247 On Sep 18, 2012 · Probably the progressive coupler inside the T-case is toast. 3. These units are designated NV247 and NV147. The progressive coupler can be replaced, but the coupler itself is $400 plus labor. I have heard a lot of mention that the "viscous coupler" going bad is often the cause of this problem. When the VC goes bad, it causes the "hopping" feeling, when the progressive coupler or pump goes bad, it defaults to 2wd. There is in fact always going some of the torque to the front wheels (around 20% when i'm not wrong), but this will increase progressively. I haven't decided on what route I want to take, but there are a few options. I suggest that you change the lubricant using Mopar NV247 transfer case lubricant. Motive Gear 5012329AA NV247 VISCOUS COUPLER Manufacturer Part Number 5012329AA ★★★★★ Aug 26, 2013 · The NV247, as mentioned above, supplies almost zero torque to the front drive shaft until there is rear wheel slippage. There is only a progressive coupler inside the T-case, which should progressively engage more power to the front wheels when there is enough speed difference between the front and the rear prop shafts. In order for that to be possible, the clutches need to be allowed to slip completely, meaning that the system must be close to completely RWD, and any transfer of torque to the front is inconsequential. Mar 30, 2010 · The 99 and newer quadra drive systems have the 247 which has the PC (progressive coupler) not the VC (viscous coupler which is in the 249). The NV247 T-case transferes around 60% of torque to the rear wheels and 40% to the front wheels during normal driving. Change your oil , dealer 247 fluid only . Aug 8, 2018 · It sounds to me like the progressive coupler in your NV247 is bad. As mentioned, the Blend Doors and Recirculation Door in the HVAC system are very common failures but are easily and cheaply fixed with a DIY attitude and ~$150 in parts. Comparatively few forum members post about repairing the NV247 transfer case when it fails because it's not very well-regarded - especially among those here who are off-road enthusiasts. So I swapped out the fluid in the transfer case with the Mopar NV247 fluid and didn't seem to help to much. When this happens, you lose 4HI but will still have RWD and 4LO. Mar 19, 2013 · Quadradrive and Quadratrac both use the same NV247 transfer case. Those are some good stompin grounds for sure. But they cost the earth. Nov 12, 2009 · I pull this transfer case out of my sisters 1999 JGC Limited 4. 247J remanufactured replacement unit from THE GEAR SHOP! This unit fits 99-04 Jeep Grand Cherokee with 4. when they fail they revert to 2wd mode, so no binding will be evident in a failing 247 transfer case. Nov 28, 2007 · What it sounds like is, your progressive coupler is going out. Aug 1, 2014 · Registered Joined Sep 11, 2012 · 816 Posts Discussion Starter· #1 ·Aug 1, 2014 I actually know it is a progressive coupler and not a viscous coupler but I wasn't sure in the WJ world if the term "PC" was used to describe it? Apr 12, 2021 · The NV247 transfer case is generally reliable, but unfortunately does have occasional issues with the progressive coupler used in 4 All-Time. I'm currently on the hunt for a good donor for a 242 TC but apparently here in the Atlanta area, it's like looking for the holy grail This predicament leaves me with a couple questions: Dec 3, 2006 · The WJ V8s came with the NV247 Quadratrac 2 TC. This is a failed progressive coupler inside the transfer case. Haven't looked if anyone has tried this. Jul 9, 2015 · It is not physically possible for a 247 T case to slip like a transmission, the rear wheels are driven by the main shaft. Feb 1, 2012 · This system uses progressive-type couplers in the front and rear differentials to make them limited-slip. Also the progressive coupler in the T case may not work if the lube in the T case is low so I would check that first. The car still binds up in tight turns. It should remain unlocked in all cases, unless the rear tires start to spin. (Assuming you have QuadraDrive. 4K views 3 replies 3 participants last post by little_Jeep Feb 20, 2012 M Dec 5, 2014 · Typical nv247 issue where in full time 4wd, the front tires would not grab when the rears slipped. 2, some stuff, some other suff, and some things that even work sometimes. Dec 12, 2012 · 4-Low bypasses the "intricate" part of the transfer case, so it'll work even if you fill the whole thing with sand and vomit. See if it works in 4L but most likely the coupler that supposed to send power automatically in full time 4wd has failed. Instead of engaging in 40ms like the WJ, the typical engagement time is 2-3 seconds of wheel spin. Jun 7, 2010 · The progressive coupler is shot. On my 2000 Jeep Grand Cherokee Limited I have this grinding noise coming from my front end during sharp turns at slow speeds. Since the OP does not have a VC but is experiencing the "hopping" it leads me to believe the problem is in the diffs. Aug 12, 2005 · It looks like 99 and up 249 transfer cases use the special fluid after they changed from a viscous coupler to a new progressive coupler that allows TC fluid to flow through it to help keep it cool. In what condition is the fluid? Popping noise is common on some Jeep Grand Cherokees with the Quadra-Trac system utilizing the NV247 transfer case. Nov 30, 2019 · The way I understand that it works is when the progressive coupler fails, it dies into permanent 2WD. Nov 11, 2009 · Probably the progressive coupler inside the T-case is toast. It seems most of you are point towards the progressive coupler. 2002 WJ transfer case binding I had someone change the fluid in the transfer case with factory fluid almost a year ago. If you get good snow traction where in 4All-time you did not, you can safely conclude that the progressive coupler is shot. The 4-low range is used for extra pulling power in off-road situations. 7 with the nv247 transfer case. Jul 18, 2021 · Click to expand Wait the select trac has a viscous? I thought the nv247 had the progressive coupler and the nv242 was chain driven? Mar 6, 2014 · Buy Motive Gear 5012329AA NV247 Viscous Coupler, 1 Pack: Drive Shaft Assemblies - Amazon. There is only one fluid that works: Mopar NV245/247/249 fluid available from the dealer for around $12. 2. TAG Manufacturing – We’re it. The NV247 doesn't put up with poor maintenance and the progressive coupler wears out. 2) CV axles can be shot even if the boot is in fine shape. When the progressive coupler fails there is no power sent to the front wheels. Bite the bullet, and get the Mopar transfer case fluid. In any case, it should still work in 4lo if the coupler is shot. NP247 NV247 TRANSFER CASE SPROCKET FITS DRIVE OR DRIVEN '99+ JEEP GRAND CHEROKEE REPLACES 5012319AA CROWN AUTOMOTIVE Compare Sale Dec 9, 2015 · The NV247 uses a gerotor-driven progressive coupler which is better than the viscous coupler. It has the progressive coupler which is leaps and bounds improved over the previous viscous couplers in the AWD ZJs. Viscous couplers are a completely different thing. After a lot of reading and searching, I know that I need to replace the chain. Jun 25, 2007 · Here is another of his responses. When the 247's PC starts to go out, the 4wd starts to fail and reverts to 2wd only. Seeing that this is most likely going to cost a lot of money to fix, I am considering switching to the NV242 with Selec-Trac. '99-'04 JEEP GRAND CHEROKEE TRANSFER CASE: PROGRESSIVE COUPLING. Full Time 4wd on these transfer cases connects the front drive through a progressive coupler that demands a very specific fluid or it simply won't work correctly. You could try a fluid change, but most of the time the coupler is shot. Transfer cases use a combination of Drive, Housing, and Shift Types. 7L) today to replace the chain and some seals and there is a broken progressive coupling thrust washer, at least that's what I think it is. The disadvantages are that the pump coupling and clutch pack are sensitive to type and quality of the lubricant used and can be overheated with extreme use such as snow plowing. Try a change of fluid (using CORRECT fluid) first but this will only be a temporary cure, if it works at all. 00, hopefully it will work "fix") 2. The coupler gets locked out in 4Lo and the driveshafts are linked together. The transfer case for QuadraTrac II is the NV247. It takes dealer-only fluid. Sep 7, 2013 · I need to replace my 247 coupler, and I need to do it with the transfer case on the car. The All-Time 4WD is RWD until the rear slips, then it engages the front. The NP247 transfer case (also called NV247) takes a special Mopar fluid: Mopar NV245/247/249 Transfer Case Lubricant (Mopar part # 05016796AB, later superseded by 68049954AB). I tried jacking each front wheel up and spinning it to test if it builds pressure and stops, but the both just spin and make a clicking noise. i'd look at cv's and steering. May 19, 2012 · Just for trouble shooting i will change the TPS sensor and see if that will change anything. Any dealer or qualified tech will look to SI or similar recources to gain this info before just dumping any fluid into any case. com FREE DELIVERY possible on eligible purchases Dec 12, 2009 · Your 247 has a Progressive coupler which is different from the 249 viscous coupler. ic l7nn 6m evqm4 v6 o9pyp 26e5 vox w2omq5r ghpf