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Old 03-23-2022, 01:56 PM   #1
jonc
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Default 240 Vibrations when accelerating / decelerating

Hi all,

I recently replaced my motor mounts and trans mount on my 91 244 with the automatic trans. Reason for the repair was the normal trans mount giveaways, vibrations when idling and on startup. I did the motor mounts a few weeks ago, moderate improvement but when I changed the trans mount this past weekend, a whole new collection of vibrations appeared.

It feels like they are running through the chassis, but appear on acceleration and deceleration, as well as when revving the engine in neutral above 1500-2000 RPM. Braking doesn't seem to affect them. My only thought so far is that the stiffer mount is now transmitting vibrations to the subframe that holds the transmission, but if that's the case then I have some serious issues I might need to look into...

Any help is appreciated
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Old 03-23-2022, 02:28 PM   #2
76RA24
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Driveshaft u-joints, center bearing also.



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Old 03-24-2022, 07:30 AM   #3
Otto Mattik
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torque rod bushings ?

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Old 03-24-2022, 05:50 PM   #4
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Quote:
Originally Posted by Otto Mattik View Post
torque rod bushings ?

this, or axle bushings
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Old 03-24-2022, 11:31 PM   #5
jonc
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I should add that the vibrations still happen in neutral. I think it may be the exhaust moving around, it was replaced at some point earlier in the vehicles life
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Old 03-25-2022, 06:27 AM   #6
Otto Mattik
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Quote:
Originally Posted by jonc View Post
I should add that the vibrations still happen in neutral. I think it may be the exhaust moving around, it was replaced at some point earlier in the vehicles life
Ok, looked at your first post again, .. you'll want to eliminate the obvious.
It might be something as simple as one of the rubber hangers slipped off, or maybe a cracked pipe.





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Old 03-27-2022, 09:38 PM   #7
Toybox
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The first clues (vibration started immediately after replaced parts) strongly suggests driveshaft alignment issues. But then you said it vibrates in neutral also.

I'm wondering if you have multiple problems.
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