Question about 1987 Jeep Wrangler

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Having problems engaging 4wd

Automatic transmission some grinding when I get it to engage

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2 Answers

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  • Expert
  • 66 Answers

When is the last time you engaged the system more than 6 months as dirt as road salt cause build up. Have you lubed the grease zerk on the 4wd shaft under neath.Silicone lubacating parts may help. May not be engaging all the way in due to poor maintenance. It is an 1987 rusted parts? Hope the ideas help.

Posted on Dec 01, 2014

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  • Jeep Master
  • 3,904 Answers

This is most certainly one I would get to a transmission shop to check out. Right now it will probably only cost you 500 bucks as opposed to 3000 later. It really could be something simple that is only 100 bucks. Aamco will diagnose for about 80.

Posted on Dec 01, 2014

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Posted on Jan 02, 2017

  • 1779 Answers

SOURCE: 4wd will not engage when

I had the same problem w/ an 88 cherokee, it was the vacuum motor located on the front axle. No vacuum, no 4x4. countrycurt0

Posted on Aug 05, 2008

  • 26 Answers

SOURCE: 4WD indicator light

on the transfer case there is a vacuum switch, check to see if there is any of the vaccum lines may have gotten crossed or the switch may be just defective

Posted on Aug 25, 2008

  • 393 Answers

SOURCE: 92 yj front axle

it actually moves a shift fork onto a spline. try moving fork by hand.

Posted on Nov 16, 2008

  • 5 Answers

SOURCE: 4wd problem jeep wrangler yj 1995

i just bought a used 97 CHEROKEE but i had the same problem, when i got to looking at it i found out the front driveshaft was shot, look at that, if its not it i would say its probably the transfer case especially with an older vehicle like that which is a very expenxive repair

Posted on Dec 21, 2008

ifixgms
  • 64 Answers

SOURCE: grinding noises when 4x4 is engaged

Most likely wheel bearing or cv joint issue. look for a ripped open cv boot. I believe that year used cv joints instead of regular u-joints. Hope I helped. Thanks

Posted on Apr 06, 2009

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4x4 transimission clunks when engaged?


When engaging the 4WD system, you are pulling the lever on the Transfer Case right? Not the transmission, it's a different gearbox.
There were several versions of transfer cases that used both full and part-time 4 wheel drive.
From your description this sounds like a part-time transfer case.
Going with that, it is somewhat normal to hear and feel a mild clunk when engaging 4WD high range, especially if you are at a complete stand-still or under full throttle.
Try engaging 4WD High while slowly rolling at idle - no throttle. It should pull in fairly smoothly.
Once 4WD is engaged it will literally LOCK the front and rear axles together. So do not do it on hard dry pavement.
These older style 4WD systems need a little "give" especially when turning. The engineers assume you are not engaging 4WD unless you are in a somewhat slippery scenario.
Many CV joints, axles, U-Joints, differentials, and transfer cases are damaged and broken by folks who don't understand this.
Reading the owners manual should provide a clearer description of what you've got.
Bear in mind that when you come out of 4WD it may not completely release, again due to hard pavement binding up the axles. You can try this: backing up 10-25 feet in a straight line, or getting one set of wheels on the shoulder or in some gravel. That should allow it to release the transfer case and go back to everyday 2WD high.
I hope this helps.
:)

May 14, 2009 | 1996 Jeep Grand Cherokee

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