GM ACDelco 3987921 Original Equipment Automatic Transmission Speedometer Driven Gear
ACDelco GM Original Equipment Speedometer Drive Gear is mounted on the transmission output shaft. The speedometer drive gear meshes with the driven gear, which connects to the speedometer cable and mechanical speedometer. This original equipment speedometer gear has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.