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I have a 1991 GMC Jimmy. When I lock it into 4 low or 4 high it doesn't want to work. Also for about 2 or 3 weeks after I take it out and put it back into 2 wheel drive there is a really loud screeching noise in the passenger side wheel. What should I look for to fix it?

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There is a vaccum line running down to the front differential check and make sure there is no vaccum while in two wheel drive. If there is then the 4wheel drive is still engaged and you may have to replace the tcc motor

Posted on Nov 08, 2014

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Posted on Jan 02, 2017

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SOURCE: 4 wheel low works but 4 wheel high does not.

sounds like the encoder on the side of the trans on the drivers side

Posted on Nov 30, 2008

  • 1 Answer

SOURCE: 1994 GMC Jimmy stuck in

Try checking the fuse when you open the driver door theres a panel look at the diagram it should be the first 20A bottom left beside the silver fuses

Posted on Jan 15, 2009

  • 11 Answers

SOURCE: will not go into 4 wheel low

Make sure you have it in (N) before shifting it. Did it work before?

Posted on Apr 10, 2010

  • 1509 Answers

SOURCE: GMC '91 Jimmy, Transfer case. When in two wheel

Yeah your right about waer but you might be blaming the wrong part. With the truck up on jack stands ( all wheels off the ground) have a helper drive the truck at the speeds that make the most noise you'll find it in the front axel or fround U joints or drive shaft splines ( drive shaft jumping ) You watch the parts moving and the joints or the cable that shifts the ront axel in and out not moving all the way it uses a vacume motor under the battery that has a cable going to the front axel. the clutches that are in the front axel have clips on them that hold the side gears that engage and disingage as you turn it on and off the clips break get lost fall off were out and let the side gears do as they please and they runinto each other a click and pop/ the cable and the shift fork that move them also fail but not htat much as the cable fails and the vacume leak pulls on a spring in two wheel and it may not be pulling hard enough/

Posted on Sep 17, 2010

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SOURCE: clunking noise whilst in 4 wheel drive

check your front drive shafts

Posted on Oct 22, 2012

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This jimmy is a 94 automatic 4x4 when u put trans in neutral and ingadge 4 low or 4hi u here the trans click **** it seem to slip back to rear wheel drive


u may have a lock hub failing 2 engage on front axles.if u have autolockers they have been knowen 2 seize up.some times a strip down&clean out®rease will sort them out also check the front jack shalft from transfer box 2 front diff make sure not lose or play in unijoints

Sep 10, 2011 | 1994 GMC Jimmy

1 Answer

Jimmy 99 put the lo gear and try to put in back in 2 hi. and still remain in 4 lo ?


My lifted 97 Expedition does that every once in a while. Try putting the vehicle in neutral, or changing from low to high on loose soil or gravel, and switch from forward to reverse a few times. 4 low is only meant for extreme conditions, so you shouldn't be using it too often.

May 18, 2011 | GMC Jimmy Cars & Trucks

1 Answer

FEELS LIKE GETTING NO GAS


cHECK THE FUEL PRESSURE AT THE RAIL. iF LOW i WOULD CHECK THE INLINE FILTER AND THEN A POSSIBLE PUMP

Jan 09, 2009 | 1991 GMC S-15 Jimmy

3 Answers

1999 gmc jimmy stuck in 4wd high


My 1999 GMC Jimmy is stuck in 4 low.

Dec 20, 2008 | 1999 GMC Jimmy

1 Answer

4 wd low range will sometimes engage 4wd high will never engage


I had a very similar problem with my 98 gmc 2500. The 4 low would engage - though the upshifts were erratic, but no 4 high though the light sometimes came on. I changed out the electric shift solenoid or whatever it is called, on the transfer case and it worked fine after that. A fairly simple fix that can be done in 15 minutes. Hope this helps.

Dec 08, 2008 | 1998 GMC Jimmy

1 Answer

4 wheel drive on my jimmy won't engage


try disconecting the battery to reset service light may not solve the problem but should allow u to put truck into 4 wheel

Dec 04, 2008 | 1999 GMC Jimmy

1 Answer

4 wheel low works but 4 wheel high does not.


sounds like the encoder on the side of the trans on the drivers side

Nov 24, 2008 | 1999 GMC Jimmy

3 Answers

4 wheel drive lights


are you setting still or driving when ingaugeing the 4 wheel drive if you are setting still try putting it in with vehicle moving if it does not light up steady in 4wd then it is not going in 4wd

Oct 24, 2008 | 2001 GMC Jimmy

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