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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    MM3 / MM4 Factory-verified

    Chevrolet · Regular Production Option

    3-speed / 4-speed manual

    Years 1978–79 Models 1 Factory citations 2

    Documented applications

    Monte Carlo
    • 1978–1979 Factory-verified

      4-speed w/ 305 only; manuals dropped after 1979

      GM Heritage factory kit — 1978 Chevrolet Monte Carlo, p.132.
      GM Heritage factory kit — 1979 Chevrolet Monte Carlo, p.25.

    This page aggregates every documented appearance of MM3 / MM4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.