Turbine Shaft Speed (TSS) Sensor

WARNING: This page is about a different car, the 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The turbine shaft speed (TSS) sensor is a magnetic pickup that sends the powertrain control module (PCM) information on the rotation speed of the coast clutch cylinder assembly.
The Turbine/Transmission Shaft Speed (TSS) Sensor is mounted externally on the top of the transmission case.
The PCM uses turbine shaft speed TSS sensor signals to help determine electronic pressure control (EPC) pressure, shift scheduling the torque converter clutch (TCC) operation.
For diesel applications the PCM sends the TCC solenoid pulse-width modulated signals to smoothly engage the torque converter clutch.