Land Rover Discovery: Four-wheel Drive Systems - Vehicles With
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DRAINING
WARNING:
Make sure to support the vehicle with axle stands.
CAUTION:
Make sure the vehicle is on a flat level surface.
Raise and support the vehicle.
Remove the engine undershield.
Refer to:
COMPONENT LOCATION - VEHICLES WITH ACTIVE DRIVELINE
NOTE:
Automatic transmission shown, manual transmission similar
Power Transfer Unit (PTU)
Driveshaft
Rear Drive Unit (RDU)
Hydraulic lines
O
Breather and tube
Drive flange
Hydraulic pressure line from AWD valve block (P4)
Hydraulic pressure line from AWD valve block (P3)
Input shaft
Left cover
Casing
Engine mounting bracket
Rig
SEE MORE:
The ECM constantly supplies the TCM with information on engine speed
and torque through messages on the CAN powertrain systems bus. The
TCM uses this information to calculate the correct and appropriate timing of
shift changes.
If the messages are not received from the ECM, the TCM will implement a
PRINCIPLES OF OPERATION
For a detailed description of the Starting System, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Starting System (303-06C Starting System - GTDi 2.0L Petrol/GTDi 2.0L
Petrol - SULEV, Description and Operation).
INSPECTION AND VERIFI