oil BMW X5 2004 E53 Workshop Manual

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Drivetrain
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.
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Front Suspension
The front suspension design is taken from the E38/E39 double pivot system. The compo-
nents are larger in size and made from all steel for the expected harder use that the X5 sus-
pension will receive. This includes the sub-frame which is also larger in size and supported
by two hydraulic mounts for vibration absorbion. The front suspension carrier incorporates
an aluminum stiffening plate that is bolted to the carrier. It adds to the front axle kinematics
by reducing flex in the front suspension. It also provides protection for the oil pan and front
end components when off-road and improves the Cd by providing a smooth surface for air
flow under the vehicle.
31530001
Front Axle Technical Data
TRACK: 1576mm
TOE-IN: 18’ +/-10’
CAMBER: -12’ +/- 20’
S.A.I: 12 Degree’s 48 Feet
CASTER: 7 Degree’s 8 Feet