Quote:
Originally Posted by sean10mm
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I researched this quite a bit and found it to be erroneous marketing on BMW's part. It is not a differential but simply a clutch pack that can send torque to the front wheels - that is the rear axle is always affixed to the drivetrain and cannot be disengaged by xdrive.
I'll look for a good source on this, but seem to remember it from these forums, if I'm wrong I'll retract my statement - keep in mind marketing documents are not always accurate.
Edit - The most objective source I can find is here: http://www.awdwiki.com/en/xdrive/ Notice that it says torque can shift from 50-50 to 0-100. I'll look for the thread where some very informed BMW owners debunked the myth that xdrive can split torque 0-100 to 100-0.