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Unread 05-25-2013, 05:19 AM   #1
North_Coast_Cab
Registered User
1990 YJ Wrangler 
 
Join Date: May 2013
Location: Bay Village, OH
Posts: 12
Engine / Transmission Mount Questions

I had a good knocking at start-up an low idle. I replaced the engine mounts with OEM ones, existing ones were not in bad shape. Then I went underneath to do the transmission mount. The mount itself was broken and the stud mount was crazy loose. I replaced the transmission mount with the Energy Suspension one I picked up at O-Reilly's. The stud bushings were in good shape so I just cleaned, disassembled and reassembled the stud set-up.
The knocking is gone, but there is a ton of vibration throughout the Jeep. I think I had over tightened the stud bushings so I went back in and loosened it up. It helped a little, but there is still way too much vibration being transferred to through the body. It feels like it is coming from the drivers side engine mount.
Anyway, does anyone have any ideas?

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Unread 05-25-2013, 09:01 PM   #2
idaholtby
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1991 YJ Wrangler 
 
Join Date: Apr 2008
Location: Meridian, Idaho
Posts: 2,554
Poly mounts for either the engine or transmission are known to transfer vibration through the body. They are much stronger and less to prone to failure, oil won't degrade as with rubber. These are a good choice for off road wheeling, but if this is mainly a daily driver, rubber mounts are really your best option.
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