Transmission Fluid Temperature (TFT) Sensor
WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The TFT sensor twist-locks into the solenoid body. The TFT is a temperature-sensitive device called a thermistor. As the transmission fluid temperature rises, the TFT sensor resistance decreases. The PCM monitors the voltage across the TFT sensor to determine transmission fluid temperature. The PCM uses the TFT signal to determine hot and cold temperature shift scheduling and TCC operation.