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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    M-15 Factory-verified

    Oldsmobile · Regular Production Option

    3-speed manual fully synchronized

    Years 1970 Models 1 Factory citations 1

    Documented applications

    Cutlass / 4-4-2
    • 1970 Factory-verified

      Std with W-31. Factory list: "Manual Transmission - 3-Speed Fully Synchronized - Floor Shift - Heavy Duty"

      GM Heritage factory kit — 1970 Oldsmobile 442 Info Kit, p.229.

    Related codes · mentioned in these notes

    W-31

    This page aggregates every documented appearance of M-15 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.