Question about 1987 GMC Jimmy

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Fullsize 1987 jimmy will not go into 4hi or 2w drive

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  • cj jones Jul 25, 2009

    I CAN DRIVE IN 4W LOW BUT WHEN I TRY TO PUT IT IN 4W HI OR 2WHEEL ITS LIKE IN NO GEAR AT ALL.

  • yadayada
    yadayada May 11, 2010

    YOU ARE SAYING IT DOESN'T MOVE AT ALL IN ANY RANGE? READ YOUR POST.

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There is a module above front driveshaft on transfer case that is bad there are two different ones so you will need it to get the correct one

Posted on Jul 25, 2009

  • paul campbell Jul 25, 2009

    the transfercase module is shot it will let the light flash but not change gear to 2w or 4 hi ive seen this over a hundred times but as i said before there is a choice of 2 so make sure you get the right one if you change this 4wd will operate normal again

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My 97 Jimmy is shifted into 4hi and will not switch to 2hi, the lights flash and i hear a clicking but it wont shift


when deactivating youre four wheel drive make sure youre rig is in nautral this helps with the gears lining up. whan youre 2-hi light flashes hit a second time. Ive had this problem befor.

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'Hokay, so now my lovable '99 Jimmy which was having breathing troubles, is now having 4WD trouble. And I think it's just the switch on the dash board; when the truck starts up, the light in 2HI doesn't...


The transfer case is computer controlled. The only way to give you a definative answer for your question is to scan your Powertrain Control Module for fault codes and perform a system check while monitoring transfer case input/output data to see if the computer is recieving the signal from the selector switch. On most GM vehicles, if there is a malfunction with ANY PART

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1987 fullsize broncho- jumping out of 2-wheel drive?


The gears in the transfer case a probably worn and need replaced.The cheapest route would be to find a good used one at a junk yard.

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HOW DO I PUT A 1998 GMC JIMMY IN 4 WHEEL DRIVE?, DO I HAVE BE IN "PARK" OR CAN I CHANGE IT INTO 4 WHEEL DRIVE WHILE IM DRIVING?


You should be able to put in 4x4 while in drive less than 35mph. Mine had a switch to turn to engage or dis-engage.

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Unable to shift from 2hi to 4hi in 1999 gmc jimmy slt 4x4


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Dec 18, 2008 | 1999 GMC Jimmy

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