Seller notes

TH400 3L80 Valve Body Shift Reprogramming Kit™ With Gear Command™ Fits all 400 1965-on Features: Automatic shiftStreet or full-raceHolds 1st and 2nd to any RPMBack-shifts to 2nd and 1st at any RPMTow&Go™, competition, pro-race, heavy duty, show-offAwesome capacity with adjustable shift timing and feel Also Includes: (2) different size 1-2 shift valvesDirect clutch high rate return springsHeavy duty intermediate pressure plate snap ring3rd clutch dual feed separator plateShift feel and cali...

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