Good point. Really the XDrive "system" includes the front and rear diffs and the ABS brakes, the XDrive transfer case is just part of it. Saying that 100% of the torque can be put to either axle, like some of the literature says, I think is a bit of a stretch though. The pre facelift transfer case must have a mechanical differential though ?? And what is the "safe mode" ??

__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)