1991 Jeep Cherokee 4WD Vibration

JEEP CHEROKEE
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CONVINCEDPEACHY
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  • 4 POSTS
I do not understand something. I have a 1991 Jeep Cherokee. We put in a new motor it seems to be working pretty good. Now when we took it on the road the transmission works fine until we put it in 4 wheel high. When we do that it feels like the transmission is wanting to come up through the floor board. And when we put it in 4 wheel low it seems like it wants to change gears or slip out of 4 wheel low. Can anyone help me with this one? :?
May 19, 2006 at 1:40 PM
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VANDRAGON
  • ✓Experienced Mechanic
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first of all, your not stupid. stupid as well as crazy people don't know they are, it they did they wouldn't need help. with that said....was it a new engine or used one? sometimes it is easier to change an engine with trans than to remove the engine from the trans. what it sounds like is that trans or transfer case isn't bolted down good. as i always say. if you have a warrenty take it back. if no warrenty, take it back anyway.
May 20, 2006 at 3:33 AM
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CONVINCEDPEACHY
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Yes i engine is new. We bought it about 4 or 5 months ago.
May 20, 2006 at 6:59 AM
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CONVINCEDPEACHY
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If you have it in 4 wheel low going off of a hill is it supposed to upshift like it would if it was in drive?
May 20, 2006 at 7:04 AM
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CONVINCEDPEACHY
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I would like to Thank You for all the help that you have giving me. We found out what the problem was. It was the driveshaft.
Again Thank You for your help. :D
May 21, 2006 at 2:10 PM
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VANDRAGON
  • ✓Experienced Mechanic
  • 298 POSTS
i knew it was in the drivetrain some where but "stupid me" forgot about u-joints simply because i have driven a front wheel drive car sence 1997. and thank you for the thank you....vandragon
May 22, 2006 at 1:09 AM
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Suggested Repair

Inspect and repair or replace the driveshaft and U-joints. Also verify that the transmission and transfer case are securely bolted down.

Conversation Summary

A 1991 Jeep Cherokee with a recently installed engine drove normally until 4-high, when it felt as if the transmission was pushing up through the floor, and seemed to shift or slip out of 4-low. An expert suggested checking that the transmission or transfer case was securely mounted and returning the vehicle if it was under warranty. The owner later reported that the driveshaft was the cause, and the expert noted that worn U-joints in the drivetrain can produce this problem.

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