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Truck running very slow on reverse?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Xenergiserx, Jan 19, 2023.

  1. Jan 19, 2023 #1
    Xenergiserx

    Xenergiserx Light Load Member

    107
    60
    Feb 2, 2021
    0
    Hello guys a have a international with a Cummins and Allison transmission automatic. Today I went to backup and the truck moved very slow. Then it would kick in fast Then Slow again. I was able to back it up very slow . The truck was in a lil bit of a incline but barely noticiable and I had 41k on the trailer.

    Don’t know if related but I can hear a boost leak. When the turbo comes on .
    But truck runs fine when going forward
    when I apply the engine break I can hear a clicking sound.
    also had a seal replaced on the trailer. When I stopped it felt hotter than the others. Not scorching hot.
     
    Xenergiserx, Jan 19, 2023
    Xenergiserx, Jan 19, 2023
    #1
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  3. Feb 25, 2023 #2
    sirrepairsalot

    sirrepairsalot Light Load Member

    66
    28
    Aug 9, 2018
    Canada
    0
    Sounds like a clutch pack starting to pack it in.. Hydraulic Pressure controls the engagement (and the constant engagement thereafter), to me it sounds like its having a hard time setting it and forgetting it. Try a new filter and top the fluid after, and see what happens. If it doesn't fix the problem then that clutch pack probably needs a refreshing with seals/orings as well.
     
    sirrepairsalot, Feb 25, 2023
    sirrepairsalot, Feb 25, 2023
    #2
    The Railsplitter Thanks this.
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