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Re: Thumping noise under center of car on shifting (archive)

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Posted by rougeux on January 15, 2001 at 08:15:43:

In Reply to: Re: Thumping noise under center of car on shifting posted by Bob on January 14, 2001 at 16:31:29:

I have the same problem now and my local guy says it's the subframe mounts. He says there is supposed to be rubber between the subframe and the body and that rubber is gone. He reported a tough task and $375 to do it. I also saw something in the archive that told me this is not a job for a do-it-yourselfer.

Good luck


Usually the carrier bearing, but check teh rear subframe mounts. If they break loose inside, they'll THUMP on initial take-off and subsequent on-throttle shifts as the subframe hits the chassis.You can pry on the subframe or have someone watch under the car whe you start off to see movement.

Bob


I just bought a 1986 528E. The seller told me he replaced the auto trans and the carrier bearing. On takeoff and shifting there is a thumping noise that sounds like it is under the center of the car. I doesn't feel like the trans is slipping. Could it be differential?






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