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Hfas

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  1. Hfas

    F650 Allison trans

    I've looked the harness over and did wrap and zip tie it up everywhere. I forgot to mention I only have the issue when it is warm out and the truck has been working hard. Al winter it was fine. Im going to check the fuse block though. Thanks!
  2. Hfas

    F650 Allison trans

    I have a Allison trans with a code 003 002003 31 SPN. I found it is supposed to be a power from TCM to ECM but I can fins a wire from one to the other. Can anyone help me out or have you seen this code before?
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