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six speed

  1. Transmission Shop
    Hello, first off I have searched this and went through 10 of the 25 pages, provided in my search. With that my question was not answered. I have a 2004.5 lly with the 5 speed Allison 1000, I’ve been doing all of the supporting mods and I’m almost ready to tune. I’d like to jump into my trans...
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