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    Allison Builders around Central Fl

    Did sonny build the transmission in you 1200hp beast?
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    Allison 6sp: LMM p0776 reverse works but no forward gears

    Transmission is fully stock. Fluid changed at regular intervals. Truck has 265,000. Highest temp ever was 206. Never pull anything just drive it hard. I’ll answer any and all questions. Trans tune by ppei, fleece lines, and a ppe deep pan. Truck is medium modified 650 rwhp I know that is...
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    Allison 6sp: LMM p0776 reverse works but no forward gears

    Truck has thrown p0776 a couple times. Converter would not lock in under wot would limp into 2 or 3, clear code and truck would run and shift just fine. Now truck only goes in P, R, and N. Putting into either D,M, or 1 all results in the same dash shows shift inhibited return to N