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allison tranny

Discussion in 'GM Powertrain' started by ki4kma, Jun 11, 2009.

  1. ki4kma

    ki4kma Member

    does anyone know how to tell if a allison transmission is slipping. It seems to kind of rev up just before it switches gears. Also i put a bully dog on it and had to take if off because the transition from first to second gear was horrible?
  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    If it revs up it's slipping. Take it in and get it scanned. Report the codes and we'll tell you how to proceed. Don't drive it if it's slipping!

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