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

    Chevrolet · Regular Production Option

    Turbo Hydra-Matic Automatic Transmission

    Years 1966–82 Models 7 Factory citations 20

    Also described as Turbo Hydra-Matic 400 3-speed automaticTHM400 3-speed automaticThree Speed Automatic Transmission, TH400Turbo Hydra-Matic automaticTurbo 400 automatic trans.Turbo Hydra-Matic 4003-speed automatic transmission - TH400

    Documented applications

    Camaro
    • 1967–1969 Factory-verified

      big blocks only

      GM Heritage factory kit — 1967 Chevrolet Camaro, p.48.
      GM Heritage factory kit — 1969 Chevrolet Camaro, p.34.
    • 1970–1974 Factory-verified

      big block / HD

      GM Heritage factory kit — 1970 Chevrolet Camaro, p.9.
      GM Heritage factory kit — 1974 Chevrolet Camaro, p.8.
    Chevelle / El Camino
    • 1967–1972 Factory-verified
      GM Heritage factory kit — 1967 Chevrolet Chevelle, p.45.
      GM Heritage factory kit — 1972 Chevrolet El Camino, p.6.
    Corvette (C3)
    • 1968 Factory-verified

      $226.45; 5,063 built (kit: $226.45 w/300hp, $237.00 w/390-400hp)

      GM Heritage factory kit — 1968 Chevrolet Corvette, p.7.
    • 1969 Factory-verified

      $221.80 (with small-block; $290.40 with 427 per period pricing); 8,161 built

      GM Heritage factory kit — 1969 Chevrolet Corvette, p.5.
    • 1970 Factory-verified

      $0.00 (no cost); 5,102 built

      GM Heritage factory kit — 1970 Chevrolet Corvette, p.5.
    • 1971 Factory-verified

      $0.00 (no cost); 10,060 built

      GM Heritage factory kit — 1971 Chevrolet Corvette, p.6.
    • 1972 Factory-verified

      $0.00 (no cost); 14,543 built

      GM Heritage factory kit — 1972 Chevrolet Corvette, p.5.
    • 1973 Factory-verified

      $0.00; 17,927 built

      GM Heritage factory kit — 1973 Chevrolet Corvette, p.24.
    • 1974 Factory-verified

      $0.00; 25,146 built

      GM Heritage factory kit — 1974 Chevrolet Corvette, p.7.
    • 1975 Factory-verified

      $0.00; 28,473 built

      GM Heritage factory kit — 1975 Chevrolet Corvette, p.7.
    • 1976 Factory-verified

      $0.00; 36,625 built

      GM Heritage factory kit — 1976 Chevrolet Corvette, p.34.
    • 1977 Factory-verified

      n/c; 41,231 built (kit: $146 with L82, $0 with base engine)

      GM Heritage factory kit — 1977 Chevrolet Corvette, p.48.
    Monte Carlo
    • 1970–1972 Factory-verified

      required with Z20/454

      GM Heritage factory kit — 1970 Chevrolet Monte Carlo, p.66.
      GM Heritage factory kit — 1972 Chevrolet Monte Carlo, p.17.
    Nova / Chevy II
    • 1968–1970, 1974 Factory-verified
      GM Heritage factory kit — 1968 Chevrolet Nova Coupe, p.65.
      GM Heritage factory kit — 1974 Chevrolet Nova, p.56.

    Related codes · mentioned in these notes

    102290427473L82Z20

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