Chevy and GMC Duramax Diesel Forum banner

transmission brake

  1. transmission brake

    Transmission Shop
    How does the trans brake work? The issue I am having is the trans brake coming on and staying on about half the time. The truck an 02 2500, stock with 160k. The tow/haul mode is not on when it does this. Sometimes when i approach a hill to climb it will go off? It is not downshifting but...
Top