Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Rear Drive Axle- differential - Vehicles without- Active Driveline/  Description and Operation

Land Rover Discovery (2009–2016) Service Manual / Chassis / Chassis-Driveline / Rear Drive Axle- differential - Vehicles without- Active Driveline/  Description and Operation



  1. Active on-demand coupling
  2. Rear differential


Vehicles without the active driveline system have a conventional mechanical rear differential. The rear differential has an integrated active on-demand coupling located on the driveshaft axis.

The rear differential operates in conjunction with the active on-demand coupling to provide controlled torque to the rear halfshafts. Torque is supplied to the active on-demand coupling and the rear differential from the Power Transfer Unit (PTU).

For additional information, refer to: Four-Wheel Drive Systems (308-07B Four-Wheel Drive Systems - Vehicles Without: Active Driveline, Description and Operation).

The torque is controlled by the electro-hydraulic active on-demand coupling.

The full time intelligent system continuously varies the front and rear torque split to provide variable All Wheel Drive (AWD) torque when required.

The active on-demand coupling is mounted on the rear differential, between the rear differential and the driveshaft. The active on-demand coupling is a self-contained unit combining mechanical, hydraulic and electronic functions to distribute torque between the front and rear halfshafts with fully automatic control.



 Rear Differential

Rear Differential Section View Active on-demand coupling Pinion shaft Taper roller bearings Pinion gear Side gear - right halfshaft Pinion gear Crosspin shaft Differential carrier Angular

 Active on-demand Coupling

Clutch assembly Pressure relief/air bleed valve Casing Driveshaft flange Electric motor and pump assembly Active on-demand coupling control module Pump housing Electrical connectors The ac

 Rear Drive Axle- Differential - Vehicles without- Active Driveline/  Diagnosis and Testing

PRINCIPLES OF OPERATION For a detailed description of the Rear Differential, refer to the relevant Description and Operation section in the workshop manual. REFER to: Rear Drive Axle and Differential


 Rear direction indicator and reversing lamp bulb replacement

Replacing a rear direction indicator: Remove the appropriate loadspace vent door. Rotate the rear lamp's retaining screw counter-clockwise, until fully released and then remove. This allows the rear lamp unit to be withdrawn. At the back of the rear lamp unit, rotate the bulb holder count

 Expanding Foam Acoustic Seals

Expanding foam acoustic seals are used in various closed-sections of the body to improve vehicle refinement. The seals are installed during the vehicle body manufacture and expand during the paint process up to ten times original size, thus locking them into position. They are located such that they

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