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Transmission temp gauge

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

  1. 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?
     
    1Logger1, Oct 4, 2025 at 10:27 AM
    1Logger1, Oct 4, 2025 at 10:27 AM
    #1
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  3. Oct 4, 2025 at 10:42 AM #2
    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’?
     
    Lazer, Oct 4, 2025 at 10:42 AM
    Lazer, Oct 4, 2025 at 10:42 AM
    #2
  4. Oct 4, 2025 at 10:45 AM #3
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Maybe it's getting very hot?
     
    Big Road Skateboard, Oct 4, 2025 at 10:45 AM
    Big Road Skateboard, Oct 4, 2025 at 10:45 AM
    #3
  5. Oct 4, 2025 at 11:26 AM #4
    062

    062 Road Train Member

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    Bottom out? Is that zero or in the red?
     
    062, Oct 4, 2025 at 11:26 AM
    062, Oct 4, 2025 at 11:26 AM
    #4
  7. Oct 4, 2025 at 2:19 PM #5
    1Logger1

    1Logger1 Bobtail Member

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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#
     
    1Logger1, Oct 4, 2025 at 2:19 PM
    1Logger1, Oct 4, 2025 at 2:19 PM
    #5
  8. Oct 4, 2025 at 3:52 PM #6
    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
     
    wore out, Oct 4, 2025 at 3:52 PM
    wore out, Oct 4, 2025 at 3:52 PM
    #6
  9. Oct 4, 2025 at 6:47 PM #7
    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.
     
    1Logger1, Oct 4, 2025 at 6:47 PM
    1Logger1, Oct 4, 2025 at 6:47 PM
    #7
  10. Oct 4, 2025 at 10:32 PM #8
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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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.
     
    AModelCat, Oct 4, 2025 at 10:32 PM
    AModelCat, Oct 4, 2025 at 10:32 PM
    #8
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