X5 50i Transfer Case Rebuild

[Maverik259]

Originally Posted by tlow98

Good read. Thanks for posting, OP.

One question - curious about the TC Calibration and why it’s a necessity after just fluid replacement?

I’ve heard/read both ways across various BMW AWD platforms. Always curious to know the reasoning.

You have to do the reset because of the change in viscosity of the fluid.

[gudmundur303]

Sorry to wake up an old thread

Does anyone know if rear driveshaft removal is needed which looks like it needs a BMW driveshaft nut wrench like the one from AGA

all information would be appreciated

[jfandl]

Originally Posted by gudmundur303

Sorry to wake up an old thread

Does anyone know if rear driveshaft removal is needed which looks like it needs a BMW driveshaft nut wrench like the one from AGA

all information would be appreciated

No, you don't need to remove the rear driveshaft, just disconnect the 3 bolts on the rear output shaft. Support the driveshaft in two locations (near the split and near the front.) I used a box and a jack stand to support them as mine was up on ramps.

Be sure to remove the 3 bolts that do NOT have nuts. This will keep the rubber guido aligned. Also mark a line so that the holes go into the same location where they came out of.