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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 905 (Rear Axle Controls) >> Description and Operation >> Differential Lock System Description and Operation >> Differential Clutch Pump Actuator Check Valve

Differential Clutch Pump Actuator Check Valve

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

The differential clutch pump actuator check valve controls the oil flow to the gerotor pumps. Without fluid pressure the pistons cannot apply the clutchpacks for rear wheel engagement. The actuator check valve will open upon engine startup and remain open unless commanded closed by the powertrain control module. The actuator check valve also monitors the sump oil for an overtemperature condition. If differential oil temperature exceeds 110°C (230°F), the valve will close and block oil flow to the gerotor pumps.

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