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  1. F

    New to dramas

    Hi all. New to the Duramax club. I bought a 2016 high country with 277k miles T &D. I love the truck but about 1300 miles in and the Allison is giving me fits, grinding and seems to “disengage” in downshift? I drained and replaced fluid and filters. I went with Dextron VI fluid. I replaced the...
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