Front and Rear Output Shaft Speed (OSS) Sensors

Front and Rear Output Shaft Speed (OSS) Sensors

The externally mounted OSS sensors are located at the rear of the transfer case. The sensors provide the 4WD control module with front and rear driveshaft speeds to control and adjust the transfer case clutch duty cycle.

On vehicles equipped with stability assist, the OSS sensors are present, but not used. The front and rear drive shaft speeds are transmitted to the 4WD control module from the stability assist module. The stability assist module receives the necessary signal from the wheel speed sensors.