Chrysler M platform

The M Platform or "M-Body" were Chrysler Corporation's successor to the F-body Dodge Aspen/ Plymouth Volare. The platform, almost identical to the F-body, was introduced in 1977, and the basis for several 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 a solid rear axle mounted on Hotchkiss-style, parallel semi-elliptical leaf springs sold in the U.S.

Chrysler M Platform
Overview
ManufacturerChrysler Corporation
Production1977-1989
Body and chassis
ClassMid-size
LayoutFR layout
Body style(s)2-door coupe
4-door sedan
4-door station wagon
Powertrain
Engine(s)3.7 L Slant 6 I6
5.2 L LA V8
5.9 L LA V8
Transmission(s)4-speed A833 manual
3-speed A727 automatic
3-speed A904 automatic
3-speed A999 automatic
Dimensions
Wheelbase108.7 in (2,761 mm) (2-door models only, 1980-82)
112.7 in (2,863 mm)
Chronology
PredecessorF-body
R-body
SuccessorY-body

The M-cars were built at St. Louis, Missouri and Newark, Delaware with initial debut (LeBaron/Diplomat series) in spring 1977 as 1977 1/2 models,[1] with some 1977-83 production also at Windsor, Ontario. Beginning in February 1987 and ending with 1989 model year, the American Motors plant in Kenosha, Wisconsin was utilized for assembly.[2]

By 1983-84, it became clear that most private buyers preferred the equally roomy but cheaper and more fuel-efficient 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. In 1989 the Chrysler M-bodies received a driver side air bag.[3] After the M-bodies were discontinued in 1989 Chrysler Corporation wouldn't build a rear wheel drive car outside of trucks and specialty models until LX based cars.

Vehicles on this platform include:

Three body styles offered:[4]

Two wheelbases used:

  • 108.7 in - 1980-1981 2-door [5]
  • 112.7 in - 1977-1979 2-door, 1978-1981 Station Wagon and 1977-1989 4-door [6]

Engines used with this platform include:

See also

References
Inline
  1. https://www.xr793.com/wp-content/uploads/2017/01/1978-Chrysler-Lebaron.pdf
  2. https://www.chicagotribune.com/news/ct-xpm-1986-07-01-8602160986-story.html
  3. https://www.nytimes.com/1988/05/26/business/company-news-airbags-on-the-way-as-chrysler-gives-in.html
  4. https://www.xr793.com/wp-content/uploads/2017/01/1980-Chrysler-Lebaron.pdf
  5. https://www.xr793.com/wp-content/uploads/2017/01/1980-Chrysler-Lebaron.pdf
  6. https://www.xr793.com/wp-content/uploads/2016/11/1981-Chrysler-Lebaron.pdf
General
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