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Old 12-24-2012, 01:50 PM   #52
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Join Date: Jan 2012
Location: MN
Posts: 7
My Ride: BMW 325xi
Originally Posted by jeepo23 View Post
What do you mean trying to engage? Isn't the AWD always running on the xi's?

Wouldn't think the tread depth have anything to do with this?

BMW AWD splits tourque 40/60 normaly. If ABS detects slip on on of the axles the power can be put up to 100 percent onto an axle. If your tire threads are off up to a certain depth nore power can be going to that one axle all the time heating it and wearing it down. So my guess is that the vibrating is caused by the axle trying to engage.
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