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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    M38 / M40 Factory-verified

    Chevrolet · Regular Production Option

    TH350 / TH400 automatics

    Years 1973–77 Models 1 Factory citations 2

    Documented applications

    Monte Carlo
    • 1973–1977 Factory-verified

      automatic standard from 1976

      GM Heritage factory kit — 1974 Chevrolet Monte Carlo, p.10.
      GM Heritage factory kit — 1975 Chevrolet Monte Carlo, p.10.

    This page aggregates every documented appearance of M38 / M40 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.