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Old 09-08-2011, 08:45 AM
Supercourse Supercourse is offline
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Location: British Columbia, Canada
 
Join Date: Feb 2008
Posts: 3,229
Mein Auto: 2004 X3 2.5i
Quote:
Originally Posted by X3-terrestrial View Post
..... mostly since Xdrive is RWD most of the time.
I thought when xDrive has been discussed before, BMW's explanation is that it is only pure RWD under very limited circumstances (such as when parking, ABS activated, over 112 m.p.h.).

Under most conditions, it's a 40/60 split.

See:
http://www.bimmerfest.com/forums/sho...d.php?t=427207

The xDrive PDF referenced does attempt to explain how the servo motor on the transfer case works to actuate the clutch packs in the transfer case.
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