Transmission Fluid Temperature (TFT) Sensor
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The transmission fluid temperature (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 resistance decreases. The powertrain control module (PCM) monitors the voltage across the TFT sensor to determine transmission fluid temperature. The PCM uses the TFT signal as an input to determine cold and hot temperature shift and TCC scheduling.