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1991 GMC Jimmy 4WD

Tiny
AOLDFIELD
  • MEMBER
  • 1991 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
The 4wd will not engage. It has the lever on the floor, you can shift to 4 high, neutral, and 4 low and indicator lights work for each. When you put it in 4 low, you can feel the rear end change but the front driveshaft does not engage and only the rear wheels are turning. Thinking maybe it is a switch on the top of the transfer case? If that is correct, how do you get to it?
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Wednesday, December 9th, 2009 AT 2:35 PM

1 Reply

Tiny
MICKEY-D
  • MECHANIC
  • 304 POSTS
Make sure the linkage is actually going into 4 wheel drive. Make sure it has a driveshaft to the front differential, and if it has external front locking hubs, make sure they are locked. If it does not have external hubs, you could have a broken gear inside the hub. Good luck.
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Friday, December 11th, 2009 AT 5:03 PM

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