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.
You have to remove and disassemble the trans down to the center support to access.