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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    GT1 Factory-verified

    Chevrolet · Regular Production Option

    Rear Axle - 2.56 Ratio

    Years 1963–79 Models 4 Factory citations 5

    Also described as 2.56:1 rear axle2.56 axle ratioRear axle - 2.56 ratio

    Documented applications

    Camaro
    • 1968–1969 Factory-verified
      GM Heritage factory kit — 1969 Chevrolet Camaro, p.182.
    Chevelle / El Camino
    • 1968–1969 Factory-verified
      GM Heritage factory kit — 1968 Chevrolet Chevelle, p.85.
      GM Heritage factory kit — 1969 Chevrolet Chevelle, p.12.
    Nova / Chevy II
    • 1968–1969 Factory-verified
      GM Heritage factory kit — 1968 Chevrolet Nova Sedan, p.6.
      GM Heritage factory kit — 1969 Chevrolet Nova, p.9.

    This page aggregates every documented appearance of GT1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.