Output Speed Sensor: Notes

Fig 1: Identifying Output Speed Sensor & Related Components

Courtesy of CHRYSLER LLC

1 - OUTPUT SPEED SENSOR

2 - REAR PLANET CARRIER/OUTPUT SHAFT ASSEMBLY

3 - TRANSAXLE CASE

The Output Speed Sensor (1) provides information on how fast the output shaft is rotating. As the rear planetary carrier park pawl lugs pass by the sensor coil, an AC voltage is generated and sent to the PCM/TCM. The PCM/TCM interprets this information as output shaft RPM. See Fig 1.

The PCM/TCM compares the input and output speed signals to determine the following:

Transmission gear ratio
Speed ratio error detection
CVI calculation