Turbine Shaft Speed (TSS) Sensor
WARNING: This page is about a different car, the 2004 Ford Ranger. 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) 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.