Transmission heat Sensor
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Joined: May 2007
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Transmission heat Sensor
Any of you fellows tell me where the heat sensor for the transmission is located, from time to time (twice) the transmission heat light went on. The Transmission nor the fluid is hot.
Ater a while the light goes out.
Bad sensor?
Thanks
Ater a while the light goes out.
Bad sensor?
Thanks
Champion
Joined: Mar 2004
Posts: 2,703
Likes: 2
From: Bremen, GA.
OPERATION
The PCM prevents engagement of the converter clutch and overdrive clutch, when fluid temperature is below approximately 10°C (50°F).
If fluid temperature exceeds 126°C (260°F), the PCM causes a 4-3 downshift and engage the converter clutch. Engagement is according to the third gear converter clutch engagement schedule.
The overdrive OFF lamp in the instrument panel illuminates when the shift back to third occurs. The transmission will not allow fourth gear operation until fluid temperature decreases to approximately 110°C (230°F).
DESCRIPTION
Transmission fluid temperature readings are supplied to the transmission control module by the thermistor. The temperature readings are used to control engagement of the fourth gear overdrive clutch, the converter clutch, and governor pressure. Normal resistance value for the thermistor at room temperature is approximately 2000 ohms.
The thermistor is part of the governor pressure sensor assembly (#2 in first picture and #25 in second pic) and is immersed in transmission fluid at all times.
The PCM prevents engagement of the converter clutch and overdrive clutch, when fluid temperature is below approximately 10°C (50°F).
If fluid temperature exceeds 126°C (260°F), the PCM causes a 4-3 downshift and engage the converter clutch. Engagement is according to the third gear converter clutch engagement schedule.
The overdrive OFF lamp in the instrument panel illuminates when the shift back to third occurs. The transmission will not allow fourth gear operation until fluid temperature decreases to approximately 110°C (230°F).
DESCRIPTION
Transmission fluid temperature readings are supplied to the transmission control module by the thermistor. The temperature readings are used to control engagement of the fourth gear overdrive clutch, the converter clutch, and governor pressure. Normal resistance value for the thermistor at room temperature is approximately 2000 ohms.
The thermistor is part of the governor pressure sensor assembly (#2 in first picture and #25 in second pic) and is immersed in transmission fluid at all times.