Turbine Shaft Speed (TSS) Sensor
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
This sensor is a magnetic pickup that sends a signal to the powertrain control module that indicates transaxle turbine shaft input speed. The turbine shaft speed (TSS) sensor provides converter turbine speed information for torque converter clutch (TCC) strategy. Also used in determining static EPC pressure settings.