Quote:
Originally Posted by MSport_Jon
(not an M3/4 but bear with me) i had the same issue on my wifes' e46 320D Touring car. Up a hill and while under heavy acceleration we experienced a vibration and at times even what felt like wheel hop. It will also make a hum sound at high speed. But it would not do any of those while down a slope or when the car had ease on accelerating. it tuned be the drive shaft heavily out of balanced and the center support bearing. What still remains is a little hum while on high speeds but barely noticeable.
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Thanks for your reply. Funny enough after fixing my wheels i have diagnosed my problem to the drive shaft as well. Issue is not on the M4 but my Z06. It looks like cylinder deactivation + light acceleration on a hill = vibration in the driveshaft.
Note: It only happens during light acceleration because the car goes into V8 mode on heavy acceleration.