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Loose X-brace (harmonic vibration)? (archive)
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Posted by Luxo M3 on October 06, 2000 at 00:25:00:

In Reply to: drivetrain noise under hard acceleration in 1st (m posted by Dan S. on October 05, 2000 at 19:07:26:


sometimes, when accelerating hard in 1st gear (full throttle) i get a sort of thumping noise (relatively high frequency, and i can "feel" it as much as hear it) from under my right elbow in the drivetrain tunnel. it will happen in about the 5000-6000 rpm range. haven't asked the dealer about it, and it doesn't happen all the time (even under full throttle).

any thoughts? thanks in advance.

Dan S.
'99 M3, x-brace, ss brake lines, and a new set of forged ltw wheels




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