Transmission oil temperature sensor is installed at valve body. This sensor is used thermistor which is changed by temperature variation. If PCM/TCM supplied about 5 voltage to sensor, then sensor output value is changed by ATF temperature variation. Transmission oil temperature sensor is very important for Transmission and sensor value is input to PCM/TCM and That information (sensor value) is important used for Damper clutch, Detected Non performance area, Controlled oil temperature variation and oil pressure at change of speed and other use.