Question about 1993 Jeep Grand Cherokee

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Just replaced viscous coupler 93 Grand Cherokee thinking that would solve the front wheels engaging/grabbing when turning on solid surfaces. Unfortunately still have that problem. Any tips on what e

Has 215,000 miles. the replacement of viscous coupler went well, no problems. Just can't figure what is causing the front to grab. It is more intense after being driven 40+ miles than say 10 miles - - that is why I thought it was the coupler

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  • Jeep Master
  • 14,036 Answers

Could be VSS SENSOR ON TRANSFERCASE FAULTY.IT WILL EFFECT SHIFTING SPEEDS.

Posted on Nov 28, 2012

  • Tim Clifton Nov 28, 2012

    Would it make you more confident that was it if I told you the "service 4wd switch" warning was being displayed sometimes? I wondered about that but most comments I read said nothing about actual operation of 4WD being effected by that warning. DOn't know

  • Jonah Oneal Nov 29, 2012

    transfercase lubricant could need changing need changing every 30000 miles interval.

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  • 2 Answers

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Posted on Jan 02, 2017

Mikey108
  • 475 Answers

SOURCE: 1996 ZG Grand Cherokee 4.0 litre 6 permanent 4 wheel drive

It takes alot of torque to get the viscous coupling to turn.
There is nothing wrong with your vehicle.
If you can turn the wheel, then you need a 700.00 viscous coupler.(plus labor)

Posted on Oct 07, 2008

  • 2 Answers

SOURCE: Transfer case? Front diff? HELP!!

I just bought a 1999 jeep grand cherokee from a guy, he was telling me that he had to replace the whole transfer case because he used fluid in it that wasnt made by jeep, thinking they were ripping him off. So maybe you put in an off brand fluid in it?

Posted on Apr 26, 2009

  • 7 Answers

SOURCE: grabs and jerks when turning

sounds like it might be in 4wheel drive may stuck there

Posted on Aug 06, 2009

  • 2926 Answers

SOURCE: the 4 wheel drive on my 2000 jeep grand cherokee

The ticking noise is most likely your tranfer case chain. the chains in this case...overtime....will stretch, causing the chain to have enough slack the hit the bottom of the case.

Posted on Jan 21, 2010

  • 2926 Answers

SOURCE: 1995 jeep grand cherokee with a 242 tranfer case.

The mode fork inside the transfer case has a weak or broken spring. This is allowing the fork to engage the mainshaft, causing it to place it in 4x4 drive. To repair this the transfer case will need to be replaced. To solve this issue temperarly, you can remove the front drive shaft to keep it from locking the front wheels, but you most likely will hear a grinding noise from time to time while driving, and would still need to address the mode fork issue.

Posted on Mar 30, 2010

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98 Grand Cherokee Loredo 4X4: When turning the wheel all the way right the back right tire seem to freeze up then lunge grabbing traction. The same happens when the wheel is turned all the way left. ...


Is this a manual 4 wheel drive system that can be shifted into 2 wheel drive? These type of systems should be in 2 wheel drive for tight turns. The drive train locks the differentials to make it 4 wheel drive and with the 4x4 engaged it creates this lunge grabbing effect.

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Inside your transfer case is an item called a fluid or viscous coupling. It pretty much is just a larger version of the same mechanism that allows the mechanical fan to engage and disengage by itself when the engine gets hot. When the coupler "sees" slipping at the rear wheels it too gets hot and engages the front wheels. If the grease inside of it manages to escape it will no longer function.
Chances are good that yours has failed.
Low range is still a direct mechanical engagement so that's why it works in low.
Except for the convenience of not needing to manually shift into four wheel drive, I never have seen any value at all in this design and have seen numerous failures to back that up.
If you have a good 4x4 shop in your area they can diagnose that easily. The repair requires that the transfer case be removed and that part be replaced. (not cheap).
If you use the vehicle for off-roading, I suggest you do a conversion and retro-fit a different case in there that does not use that design (expensive but worth it if you use it off road). If not, just have yours repaired.

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From what I know about that system I don't think you can without possibly damaging the transfer case and, I don't think you really need to. The way the system works, the front wheels are not really engaged unless the transfer case "sees" slippage or a dis-similar turning speed between front and rear wheels (why it's important to keep all tires exactly the same in size, brand and tread depth) when it sees a difference a coupler inside the case heats up and makes the engagement. On dry ground, there is no slippage and the unit remains in two wheel drive.
Therefore, I'd leave it alone.

May 14, 2010 | 2004 Jeep Grand Cherokee

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Does anyone know anything about a viscous disk in a drive shaft to a 1999 Jeep grand cherokee?


viscous coupler is inside the transfer case. Failure is not "chronic" but they do fail. Easiest way to make one fail is to use different sized tires front and back (one size at front, different on back. tires do not need to be marked differently as tire actual height varies with manufacturer)...,a one inch difference in height results in a 3inch difference in tire rolling distance. Since all your wheels are connected to a single point, the transfer case, eventually if everything was not permitted to slip, something would snap. With different rolling distances, the coupler needs to slip all the time, which causes it to overheat and fail. Being a mechanical component, they do fail all by themselves sometimes though.

Sep 13, 2009 | 1999 Jeep Cherokee

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My 95 jeep grand cherokee binds up when i am turning


My 94 did that. It was the viscous coupler. This part is inside the transfer case. It is what allows the front and rear to move somewhat independently yet conected. I am pretty handy so I was able to change mine myself. This can help
http://www.automotiveforums.com/t601301-viscous_coupler_replacement_v2_0.html

I did all of my work from under the jeep

Jun 29, 2009 | 1995 Jeep Grand Cherokee

2 Answers

Transfer case? Front diff? HELP!!


Sounds like a transfer case problem. But I can't verify that from here. Coupler is inside the unit on the output shaft and needs teardown to get to it.

Apr 21, 2009 | 1999 Jeep Grand Cherokee

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Problems taking sharp turns with all wheel drive


could be the lock differential not working properly may need some clutch additive for the rear end

Nov 15, 2008 | 1996 Jeep Grand Cherokee

1 Answer

1996 ZG Grand Cherokee 4.0 litre 6 permanent 4 wheel drive


It takes alot of torque to get the viscous coupling to turn.
There is nothing wrong with your vehicle.
If you can turn the wheel, then you need a 700.00 viscous coupler.(plus labor)

Sep 09, 2008 | 2001 Jeep Grand Cherokee

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Seems to be problem with power steering. makes horrible grinding noise when turning left or right. have spent thousands with different mechanics. they have never figured it out. but it seems to be with the...


Do you have a Grand Cherokee with full time all wheel drive? If so the viscous coupler in the transfer case could be at fault. They fail 100% of the time in those jeeps at around 100,000 miles + or -. In tight turns after the t-case warms up the Jeep will make an awful howling noise and the tires will usually chirp on pavement. The only fix is an updated viscous coupler or a new t-case.

Jul 24, 2008 | 1994 Jeep Grand Cherokee

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