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Old 05-21-2002, 09:03 PM
Registered User
Join Date: Feb 2002
Posts: 29

I was experiencing loud clanking and bumping when shifting from R to D and visa versa. I diagnosed the problem to the front flex disk and I just got finished replacing it. The clanking sound is gone, but the bump still remains when driving and letting off the pedal and when shifting. The back flex disc appears to be fine, but I am not positive. Also, I think I remember reading something about a part in the middle of the driveshaft. Could that be my problem? If so, what is it called and how do I go about installing it?

1988 260E
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Old 05-21-2002, 09:45 PM
Ashman's Avatar
Service Advisor
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
how are your engine/tranny mounts? all in good shape?

Couldn't a bad mount cause extra movement when accelerating etc of the tranny etc?

At the cost of the flex discs, the rear shouldn't be a big deal to change regardless.

I had both of mine done due to slight cracking in them, not that I notice a difference, but it gives me peace of mind knowing I can track their mileage now..

'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
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Old 05-22-2002, 06:49 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,234
Inspect the engine, tranny and differential mounts real good and replace as necessary. Oil on them makes them deteriorate over the years.
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Old 05-22-2002, 08:09 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The rear differential mounts cause quite a thunk when shot. They are the two round mounts off the differential mounted into the subframe about a foot apart.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 05-22-2002, 10:25 AM
Registered User
Join Date: Feb 2002
Posts: 29
I am going to order a rear flex disc and a driveshaft bushing tonight. Could that help? Anything else I should order or try?

1988 260E
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Old 05-22-2002, 11:51 AM
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,503
Fwiw, I had the same noise you have, and it was my rear differential mounts.
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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