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Old 10-22-2012, 01:14 PM   #18
GSherbs
Registered User
 
Join Date: Jun 2012
Location: Chicago
Posts: 400
My Ride: 2002 330 xi
Have you inspected your wheel bearings?

A long shot as I wouldn't expect failure here to cause vibration as much as outright noise but it sounds like you've already addressed the most likely issues.

Also take a look at your drive shafts (although you probably already have) - maybe they are out of balance some how?

I'm not 100% convinced that the ambient temperature isn't just a red herring.

Tough problem - hope you find it though - and, of course, let us know! Its rare around here for someone to have a completely unique problem.
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