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Old 11-19-2012, 09:17 AM
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tim330i tim330i is offline Founder
Location: SF
Join Date: Dec 2001
Posts: 9,360
Mein Auto: Ti Silver 03 M3
I'm 99% sure xDrive is open diffs but the system uses the brake on the slipping wheel to transfer torque to the other wheel. I would guess that is how the Acura system works as well, Audi has a much more complex diff system.

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