X-Drive diff and transfer case oil change time?

[cn90]

Originally Posted by kvc

I am also curious as to why adaptations must be programmed after the transfer case fluid change. What exactly does this do?

I personally think the BMW engineers, in their wisdom after having a few beers and bratwursts, theorize that the "old" fluid becomes "more liquidy" after ___ miles. The new fluid is supposedly "tighter".

As the car is driven the computer gets used to old liquidy fluid.

So when one puts a tighter fluid in, the computer needs to be reset for the new tighter fluid.

All nice in theory. In reality, it is a worthless idea, IMHO...