Turbine Shaft Speed (TSS) Sensor
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
This sensor is a hall effect pickup that sends a signal to the PCM 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 LPC pressure settings.