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      03-03-2026, 11:36 AM   #16
Thumbie
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Drives: 2011 M3/4/6
Join Date: Sep 2021
Location: SF Bay Area

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Great opportunity to get some powerflex diff bushings!

Quote:
Originally Posted by DrFerry View Post

Recommendations:
1) Replace all Diff bushings
2) Check for worn universal joints on the Diff end of the driveshaft
3) Get under the car and try to rotate the driveshaft when in neutral by hand to locate the clunk and determine if the ring and pinion backlash is excessive i.e. the clink culprit
4) Consider replacing the LSD and getting the ring and pinion backlash adjusted when you're in there.

PS: I very much doubt it's the CV axles because they don't move when your foot is on the brake and that's when the clunk happens i.e. before the car moves.
I'd start with #3 because it is the most free
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2011 Jerez E90 M3 6-speed Competition Package
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