Eaton clutch problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mromgcorey, Apr 1, 2026.

  1. mromgcorey

    mromgcorey Bobtail Member

    22
    11
    Apr 15, 2022
    0
    SPN 788 FMI 7
    SPN 560 FMI 11

    I was switching trailers one day and the lower gears seemed to be grabbing really hard and when I put it in Neutral, the truck shut off and wouldn't turn on until I pulled the fuse for the trans. These are the codes I was getting.

    I drove another 300 miles and it did it again when I put it in N but was able to turn back over. Everything seems to be working okay but the faults stay.

    The only other issues I've had is a SPN 752 FMI 2 when it rains really hard. Then the truck won't shift anymore until it dries off and then it starts working again.

    I took it to a shop and they said the clutch was broken and something about the spring...

    I've been told there is still clutch left from another mechanic and I don't see how the clutch could be broken.

    What do you guys suggest?
     
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  3. Deezl Smoke

    Deezl Smoke Medium Load Member

    540
    356
    Feb 12, 2011
    Hillsboro Oregon
    0
    "when it rains really hard". Moisture in a module, and/or corroded joints on a circuit board. It don't matter how nice and shiny the pins are at the connector, moisture gets inside the various modules and causes all sorts of issues. Youtube has hundreds of videos discovering the corrosion in different makes and models, and some are able to make repairs, some replacements of modules. Module replacement often seems to require a laptop to get the rest of the truck to recognize the new module.
     
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