Pulsing Vibration in Overdrive - JeepForum.com
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post #1 of 3 Old 05-15-2011, 03:11 PM Thread Starter
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1999 WJ 
Join Date: May 2011
Location: Houghton
Posts: 4
Wj Pulsing Vibration in Overdrive

First post here.

Just picked up a 1999 WJ a few months ago. The rig is all stock with a 4.0L and 42Re. On my last long trip I noticed a faint pulsing vibration when in Overdrive only. It mostly occurs when going up hills or accelerating. The vibration seemed to start after I replaced drag link ends, but is coming from the middle/rear end. Can't seem to pin down where the vibration is coming from and it seems to be getting worse. My first thought is transmission mounts, but not sure how to check those.

I've done a bunch of searching and found many threads on this type of problem, but the ones I could find were dealing with lifted WJ's and Wranglers.

Thanks in Advance

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post #2 of 3 Old 05-17-2011, 05:38 PM Thread Starter
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1999 WJ 
Join Date: May 2011
Location: Houghton
Posts: 4
Alright, so didn't get any replies on my vibration problem, but figured it out and thought I would post my solution since this seems like a pretty common problem.

Turns out a rubber isolator around an exhaust hanger slid out of place. The hanger was right next to the transmission pan. Pretty simple fix....just slid the rubber isolator back into the housing. Thought it was going to be something more serious since it ONLY happened in OD.

I posted some pics of the hanger I'm talking about in case you have this problem...hopefully it will clarify
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Exhaust hanger2.jpg   Exhaust Hanger.jpg  
UPJeepster is offline  
post #3 of 3 Old 05-17-2011, 06:16 PM
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2000 WJ 
Join Date: Mar 2011
Location: valparaiso
Posts: 282
Just saw this thread and my first thought was exhaust before I opened it I'm having the same problem only mine the hanger is completely broke
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