The input speed sensor, also called the transmission speed sensor, is located on the transmission case and is responsible for sending a signal to the PCM (Powertrain Control Module) about the speed of the transmission input shaft. The PCM uses this signal to calculate the appropriate shift points and to control the operation of the transmission solenoids.
Output Sensor:
The output speed sensor, also called the driveshaft speed sensor, is located on the rear of the transmission case and is responsible for sending a signal to the PCM about the speed of the transmission output shaft. The PCM uses this signal to ensure that the transmission is shifting properly and to control the operation of the torque converter clutch.
Both the input and output speed sensors are essential for the proper operation of the transmission. If either sensor fails, the PCM will not be able to receive the necessary signals to control the transmission, which can result in shifting problems, loss of power, or even transmission failure.
