Forum Discussion

352's avatar
352
Explorer
Sep 30, 2013

Transmission temperature

I have a 2000 5.9 Cummins. 3-55 gears. Took it on a test run with the built transmission and 12,000 load. Is pointing an inferred temperature sensor at the pan or transmission an accurate way to determine all round transmission temperature? Sensor was 164 to 172 all over the transmission and pan. Is that within the norm?
Tow Vehicles
  • mileshuff's avatar
    mileshuff
    Explorer
    Oct 01, 2013
    Pointing an infrared sensor at the pan or transmission most likely would result in a somewhat lower temperature than the oil itself. Run at highway speeds without towing up a good grade then immediately check it. Then at least you have a reference point to compare how much higher its getting when towing. A sensor in the pan is next best but the preferred method is a sensor in the line going to the cooler.

    Anyone know where manufactures typically put the sensor thats read by the trucks controller and available thru OBDII?

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