Differential Assembly: Description and Operation

Rear Drive Axle Description and Operation





The rear differential assembly in this vehicle consists of an aluminum housing which contains a electric clutch/coupler and a differential. The differential fluid is only contained in the differential housing portion.


The clutch and clutch housing are serviced as an assembly. The clutch housing also has no differential clutch control module (CCM).


The differential clutch control module has integrated active clutch control logic.


The clutch or coupling can provide torque to the rear differential under a wide range of driving conditions. It differs from past on-demand systems as it can preload the clutch during take off to provide a less likelihood of wheel slip.


The clutch control module (CCM) is connected to the vehicle serial data stream via the control area network (CAN).


It uses data stream information from the engine control module (ECM) and the ABS/stability control module. The CCM monitors such signals as individual wheel speeds, ABS/stability control active, throttle position or wheel torque request to determine mode of operation.


The fluid level range for proper rear differential assembly operation is 500 ml. New service replacement units will be shipped dry (without fluid). Fill new units with 500 ml of GL Synthetic fluid.