Transmission, automatic, 4 speed, HMD, F31 (4T60E), electronically controlled clutch

Years 1992–95, 1998 Models 2 Factory citations 5

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Also described as Transaxle, 4 speed automatic

Also documented for Buick Chevrolet Pontiac

Documented applications

Silhouette — U-body (1990–1996)

1992–1995 Single-source

with the L27, which it requires; the kit pages print "4-Speed Automatic Transmission"; matched to the unit by meaning: Wikipedia gives the 3800 a 4 speed 4T60-E automatic from 1992 but prints no code; 1995: not on the cargo van; 1996 is not claimed because no listed 1996 kit page prints M13; shared U-body code; cited from the Chevrolet Lumina APV kit

GM Heritage factory kit — 1992 Chevrolet LuminaAPV, p.42.
GM Heritage factory kit — 1993 Chevrolet LuminaAPV, p.40.
GM Heritage factory kit — 1994 Chevrolet LuminaAPV, p.40.
GM Heritage factory kit — 1995 Chevrolet LuminaAPV, p.79.

Silhouette — U-body second generation (1997–2004)

1998 Factory-verified

requires LA1

GM factory document — 1998 oldsmobile silhouette ext rpo code list, p.1.

This page aggregates every documented appearance of M13 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.