The transfer case is found on all-wheel-drive vehicles and is responsible for the front to rear distribution of power. Proper service and fluid changes are required to avoid costly failure. 

If your ZF automatic is having solenoid control problems you can replace the troubled solenoids individually and save the expense of replacing an entire valve body
This sealing sleeve is an internal transmission component for your BMW. We have all of the transmission components to make your BMW shift like a new car again.