Transmission Speed Sensor: Description and Operation
OUTPUT SHAFT SPEED (OSS) SENSORThe Output Shaft Speed (OSS) sensor is a magnetic pickup, located at the output shaft ring gear, that sends a signal to the Powertrain Control Module (PCM) to indicate transmission output shaft speed. The OSS is used for torque converter clutch control, shift scheduling and to determine electronic pressure control.
TURBINE SHAFT SPEED (TSS) SENSOR
The Turbine Shaft Speed (TSS) sensor is a magnetic pickup that sends the Powertrain Control Module (PCM) torque converter turbine speed information.
The TSS sensor is mounted internally on the center support.
The PCM uses TSS information to help determine Electronic Pressure Control (EPC) and Torque Converter Clutch (TCC) operation.