Transmission Output Shaft Speed (OSS) Sensor

The transmission output shaft speed (OSS) sensor is located on the extension housing. The OSS is a Hall-effect type sensor. The OSS reads the gear teeth on the park gear, different than the teeth used for park function. The OSS input to the PCM is used for shift scheduling, timing and torque converter clutch (TCC) operation vehicle speed. The OSS has bi-directional capability and has a digital output.