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allison mt640 mt643 mt646

  1. MT643 in overpowered 1.5 ton truck ?

    Transmission, Adapter, Transfercase Discussion
    Has anyone used an Allison MT643 or like transmission in a light truck? How did you like it? In medium duty trucks they seem to always want to run up to the governed rpm and be eager to downshift. Maybe by playing with the throttle cable it can be made a little different, i.e. the cable slacks...