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Home >> Ford >> 2021 >> Bronco Base, 2D Utility, 2.3L Eng VIN H, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Differentials & Drive Axles >> Front Drive Axle/Differential - 4X4 With Part Time Engagement >> Description And Operation >> Front Axle Disconnect Actuator - System Operation and Component Description >> System Operation >> Front Axle Disconnect System Operation >> Principles of Operation
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Principles of Operation

NOTE: Front axle disconnect is associated with open type front differential - DANA M190.

The FAD (front axle disconnect) distributes torque across the front axle halfshafts for 4WD operation when requested. It reduces the drag and wear on the differential when disengaged, as only one axle is connected to the differential in this instance. It is controlled by the AWD module.

Torque (when commanded or selected) is provided to the front wheels via the front driveshaft, front drive axle and the FAD (front axle disconnect).

When 4H or 4WD Low (4L) operation is requested, the AWD module actuates the motor to rotate the cam. When the cam rotates, it slides the dog clutch to engage with the input shaft from the differential. This action connects the front RH half shaft to the front axle, providing 4WD operation.

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