Transaxle, 5 speed manual, Getrag

Years 1991–92 Models 1

Documented applications

Cutlass Supreme — W-body (1988–1997)

1991–1992 Single-source

the Getrag HM-284 with the LQ1; the W-Body Page's table gives M27 for 1991–1992 (an enthusiast page that the tier map never verified); Wikipedia's Cutlass Supreme text puts the end of the manual option in 1992 and pairs the 5 speed with the 3.4L in 1991 and 1992; its 60° V6 article gives the Getrag 284 as optional 1991–1993, so 1993 is left out (see the report gaps); the listed Lumina kit pages of 1991 and 1992 carry no readable model year, so no kit is cited; same description as grand-prix-gen6

This page aggregates every documented appearance of M27 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.