The transfer case, driveshafts, final drives and half shafts make up the drivetrain assembly. The transfer case is always mounted in the same position on the X5. This applies to other markets and future models that will utilize different transmissions for different engine con- figurations. With these models, the transmission tail shafts will be modified to match up with the transfer case.
The rear driveshaft is a two piece unit using a center bearing, while the front drive shaft is a single piece that is splined to the transfer case and bolted to the front differential.
The breather vents for both differentials and the transfer case are mounted higher up on the chassis to prevent water from entering if the vehicle is driven off road through water. The front breather passes up into the engine compartment and is mounted under the left side ignition coil cover. The rear breather passes along the under side of the body and is mount- ed behind the left side wheel arch cover. The breather vent for the transfer case is mount- ed up high in the driveshaft tunnel.