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Allison Trans problem What could it be?

Discussion in 'Chevy Trucks' started by Rob Abner, Feb 20, 2003.

  1. Rob Abner

    Rob Abner Junior Member
    Messages: 25

    Last night when I backed the Duramax into the driveway the Allison shifted very hard and clunked into gear then proceeded to make a zzzzzzzzzz sound for about 1 second almost sounded like tires spinning. The truck has 60,000 miles this is the first year for it plowing and it has been maintained perfectly per H/D service interval charts.

    Any help on possible problem would be greatly appreciated
  2. mpich

    mpich Junior Member
    from Canada
    Messages: 8


    Bring it and get it checked if it is still under warranty we have had a few in the shop already.