Transmission unit, manual 5 speed

Years 1987 Models 1 Factory citations 1

Also documented for Chevrolet

Documented applications

Firebird — Third generation (1982–1992)

1987 Factory-verified

a unit behind MM5; 3rdgenformula pairs it with the V6; Firebird years: 3rdgenformula option pages 1987; shared F-body code; cited from the Camaro kits

GM Heritage factory kit — 1987 Chevrolet Camaro, p.3.

This page aggregates every documented appearance of MB1 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.