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    Allison 6 speed transmision?

    Maybe this isn’t relevant... I have a ‘92 F-350 quad cab, long bed, 4x4, IDI or DI? ATS turbo, 1:4.10 gears. 5 speed manual ZF. I haul 3 cord wood through Idaho mountains and it does great. Keeps up with my buds ‘97 F350 powerstroke automatic no problem. Better tower for having 5 speed. Still I...
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