Output Speed Sensor

OUTPUT SPEED SENSOR

The Transmission Control Module (TCM) uses the Output Speed Sensor (OSS) to determine shift points and TCC engagement points. The OSS is a variable reluctance sensor. Changes in the reluctance of a magnetic circuit caused by the passing of the rotor lobes on the output shaft result in the OSS outputting an AC periodic voltage wave form. The frequency and voltage of the wave form are proportional to the transmission output shaft speed.