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  1. J

    Allison 6sp: Duramax allison tranny issues

    I did get a low mileage used warranted ACDelco TCM
  2. J

    Allison 6sp: Duramax allison tranny issues

    hey Burn Down, super cool of you to chime in and thanks for the welcome! This is my first Duramax. I bought this truck from auction so no history. 2011, 3500 flatbed work truck with 180,000 miles. LGH Engine, variant of the LML. Bone Stock, no mods. I was in the hospital, wife gave birth, so my...
  3. J

    Allison 6sp: Duramax allison tranny issues

    Hi AKhdironman, I have the same issue as you had, did you ever resolve this issue? I have done a search on this exact problem with the brake pedal clicking when the trans goes in Limp mode. Nobody else seems to have had this problem. I'm hoping you could share your experience with me as I am...