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      02-20-2011, 11:08 AM   #4
piloto
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Drives: 2011 E90 M3 - AW/FR
Join Date: Jun 2010
Location: Orange County, CA

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It's a clutch type differential. It's basically the same concept and design as the E46 M3's differential. Here are two brief articles on it:

http://www.usautoparts.net/bmw/model...ig/m3_diff.htm

http://www.autos.ca/auto-tech/auto-t...ferential-lock
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