Chrysler M platform

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Chrysler M Platform
Manufacturer Chrysler Corporation
Production 1977-1989
Body and chassis
Class Mid-size
Body style 2-door coupe
4-door sedan
4-door station wagon
Layout FR layout
Engine 3.7 L Slant 6 I6
5.2 L LA V8
5.9 L LA V8
Transmission 4-speed A833 manual
3-speed A727 automatic
3-speed A904 automatic
3-speed A999 automatic
Wheelbase 108.7 in (2,761 mm) (2-door models only, 1980-82)
112.7 in (2,863 mm)
Predecessor F-body
Successor Y-body

The M-Bodies were Chrysler Corporation's successor to the F-body Aspen/Volare. The platform, almost identical to the F-body, was introduced in 1977, and it was the basis for some mid-sized Chrysler models until its demise in 1989. The M-body was also the successor to the short-lived R-body, as the Chrysler New Yorker and Plymouth Gran Fury moved to it following the R-body's demise in 1981. The M platform was the final production passenger car with semi-elliptical leaf springs sold in the U.S.

The M-cars were built at St. Louis, Missouri, with some 1977-83 production also at Windsor, Ontario and Newark, Delaware. Beginning in late 1986 (1987 models) and through the last 1989 year, the American Motors plant in Kenosha, Wisconsin was also used for production.

By 1983-84, it became clear that most private buyers preferred the equally roomy but cheaper and more fuel economical K-cars; however, the M's long-proven traditional engineering, handling, and V8 engine availability appealed to police and taxi fleets, allowing the car's continued existence until the end of the decade.

Vehicles on this platform include:

There were three body styles offered:

There were two wheelbases used:

  • 108.7 in - 1980-1981 2-door models
  • 112.7 in - 1977-1979 2-door models and 1977-1989 4-door models

Engines used with this platform include:

1977 Dodge Diplomat sedan 
1980 Chrysler Town and Country station wagon 


See also[edit]