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  1. #1

    Default Trannsmission Swap

    I have an 07 Silverado, crew cab with the 6.0 Vortec Max. Unfortunately my truck comes with the 4 speed transmission. Has anyone heard of a 5 or 6 speed aftermarket or factory transmission upgrade for my year/model/motor?

  2. #2

    Default

    Allison Maybe?


    03 Chevy Silverado 1500 ext cab Z-71
    79 AMC Spirit GT
    77 Olds cutlass supreme

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