Transmission temp gauge

Discussion in 'International Forum' started by 1Logger1, Oct 4, 2025 at 10:27 AM.

  1. 1Logger1

    1Logger1 Bobtail Member

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    Mar 12, 2025
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    i bought a used 2020 520 HX, with a Eaton fuller RTLO-18918B, my trans temp gauge will trip the audible alarm and the gauge hand will bottom out on the dial shortly into my day of driving. I replaced the sensor on the lower passenger side of the trans. This did not fix the issue, is there another temp sensor?
     
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  3. Lazer

    Lazer Road Train Member

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    Are sure the transmission is not low on lubricant? And, just as important is the correct lubricant in the transmission? Is there a ‘transmission cooler’?
     
  4. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Maybe it's getting very hot?
     
  5. 062

    062 Road Train Member

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    Bottom out? Is that zero or in the red?
     
  6. 1Logger1

    1Logger1 Bobtail Member

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    Mar 12, 2025
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    It was full when i drained the tranny, i replaced the oil and the “sensor” with Eaton fuller synthetic Manuel trans oil 50#
     
  7. wore out

    wore out Numbered Classic

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    Most times when one’s hot you can smell it. A faint oil smell. Worse case fall under there and see if you can touch it. My money is on you cant
     
  8. 1Logger1

    1Logger1 Bobtail Member

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    Mar 12, 2025
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    First I appreciate the response, i do have a little common sense and Of coarse i put a hand to the side case, cool to the touch.
     
  9. AModelCat

    AModelCat Road Train Member

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    If by pegged you mean it went to the 6 o'clock position then I believe you've got a CAN issue. I seem to recall the gauges do that on Internationals when they have a CAN communication problem.
     
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