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      04-04-2012, 07:24 PM   #8
DocJohn
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Drives: 2012 M3 Coupe
Join Date: Oct 2011
Location: New Jersey

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There is some diff whine when you are off-throttle. It happened on my last M3 too. If you give it some throttle or put the clutch in, it goes away.
My dealer says it is normal, but varies from car to car.

The changed the diff fluid a few times in my last M and it got a little better...