facelift/pre-facelift & 1/2 model years??

[PropellerHead]

Originally Posted by TiAgX5

The torque split is fixed by the gearing UNTIL brake actuation causes the torque to the slipping axle to TRANSFER to the non-slipping axle.

Well aware of how Xdrive works.

You may be, but appear not to be aware of how a non XDrive/prefacelift AWD system works:

Originally Posted by TiAgX5

Not the case. Pre-facelift Xs were able to direct 100% of torque to front/rear axles and side to side using automatic brake activation.

This just isn't true. It should read "Pre-facelift Xs were able to direct fixed power of 38% to the front and 62% of engine power to the respective axle." You might have then offered that DSC/braking allows this transfer from side to side, but the ratio is the main thing that you have wrong.

I don't have any issue with how this happens- DSC enabled. Never said any different. What I said was that the face lift models with XDrive offer this up to 100% of available TQ to either axle. Pre-face lift X's do not. Plain and simple.

Here is a source from BMW that explains the difference. Pay attention to the 2nd and last paragraphs. The differences in the systems are clearly not what you think they are: