4-speed manual transmission

Years 1976–81 Models 3 Factory citations 5

Also described as 4-speed manual (later Saginaw/BW coding)4-speed wide-ratio manual transmission

Documented applications

Camaro

late 1970s Confirmed

Corvette (C3)

1978 Factory-verified

$0.00; 4,773 built; factory kit confirms RPO MM4 on the option index (p.22)

GM Heritage factory kit — 1978 Chevrolet Corvette, p.22.
1980 Factory-verified

$0.00; 5,726 built

GM Heritage factory kit — 1980 Chevrolet Corvette, p.62.
1981 Factory-verified

$0.00; 5,757 built (factory kit resolves: Black Book page p.21 shows 5,757 — not CAC's 5,575); final year a manual was offered until 1984

GM Heritage factory kit — 1981 Chevrolet Corvette, p.21.

Nova / Chevy II

1978–1979 Factory-verified

GM Heritage factory kit — 1978 Chevrolet Nova, p.58.
GM Heritage factory kit — 1979 Chevrolet Nova, p.56.

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