Ford MN12 platform

Ford MN12 platform
Ford MN12 platform
	1989 Ford Thunderbird SC (Super Coupe)
Overview
Manufacturer	Ford Motor Company
Also called	FN10 platform (Lincoln Mark VIII)
Production	1988-1997
Assembly	Lorain, Ohio (Lorain Assembly) ; Wixom, Michigan (Wixom Assembly)
Body and chassis
Class	Personal luxury coupe; Grand touring luxury coupe
Layout	FR layout
Body style(s)	2-door coupe
Vehicles	Ford Thunderbird (tenth generation); Mercury Cougar (seventh generation); Lincoln Mark VIII
Powertrain
Engine(s)	3.8 L (232 cu in) Essex V6; 4.9 L (302 cu in) Windsor V8; 4.6 L (281 cu in) Modular V8
Dimensions
Wheelbase	2,870 mm (113 in)

The Ford MN12 platform (Mid-size North America Project #12)[1] is a car platform that was used by the Ford Motor Company from 1988 to 1997 for the 1989–1997 model year Ford Thunderbird and Mercury Cougar two-door personal luxury cars. A variant of this platform, known as the FN10 (Full-Sized North American Project #10), was used for the 1993–1998 model year Lincoln Mark VIII from 1992 to 1998. Each car based on this platform had a front-engine, rear-wheel drive layout with an independent rear suspension.

Development

1996-1997 Mercury Cougar

The roots of the MN12 program began in 1984[2] when Ford sought to build on the success of the then-current, Fox body-based Thunderbird and Cougar. Going beyond unique styling, Ford wanted to produce a Thunderbird and Cougar that could compete with more sophisticated and higher performing cars from European automakers such as BMW. To accomplish this, Ford needed to develop a new platform since the existing Fox platform couldn't satisfy the requirements of the MN12 program.

Heading the program was Anthony "Tony" S. Kuchta, who was appointed to the position by Ford management in 1986, when formal production program began. Kuchta decided to retain a rear-wheel drive layout for the MN12 platform as a basis for delivering better road performance, as opposed to following the Thunderbird and Cougars' front-wheel drive-based rivals from General Motors, such as the Pontiac Grand Prix and Buick Regal. Kuchta also approved an independent rear suspension for the MN12 platform, something that would make the Thunderbird and Cougar the only rear-drive domestic cars other than the Chevrolet Corvette (and the later Dodge Viper RT/10) to feature this.

Ford engineers working on the MN12 program also explored the use of all-wheel drive for the platform with Ford going so far as paying German automaker Porsche to study the feasibility of its use, but Kuchta ultimately decided against it out of cost concerns.[3]

Overview

1998 Lincoln Mark VIII LSC

MN12 cars had a 113" wheelbase and were available with a 3.8L V6 engine, a 3.8L V6 supercharged engine from 1988 to 1995 (1988-1990 in Cougar), a 5.0L V8 engine from 1991 to 1993, and a 4.6L V8 engine from 1994-1997. A 4.6L DOHC V8 engine was used for the FN10 platform Lincoln Mark VIII from 1993 to 1998.

Suspension

The front suspension consists of upper and lower control arms with coilover shocks. A common misconception with this platform is that the front end has struts; however, since there is an upper control arm they are actually coilover shocks. Brakes were a vented rotor / single-piston caliper with Sport model Thunderbirds receiving a larger diameter rotor. The rear suspension consisted of upper and lower control arms with coil spring and shock. Varying sway bar diameters were used among the different models of Cougar and Thunderbird. All MN12 cars shipped from the factory with a 5 x 4.25" (5x108mm) lugnut bolt pattern.

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References

"What is MN12?". Thunderbird & Cougar Club of America.
Holloway, Charles A.; Bowen, Professor H. Kent; Clark, Kim B.; Wheelwright, Steven C. (1994). The Perpetual Enterprise Machine: Seven Keys to Corporate Renewal Through Successful Product and Process Development. ISBN 9780195080520.
Ingrassia, Paul; White, Joseph B. (18 October 1995). Comeback: The Fall & Rise of the American Automobile Industry. Simon & Schuster. p. 212–216. ISBN 978-0684804378.

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[mn12plat-1] "What is MN12?". Thunderbird & Cougar Club of America.

[2] Holloway, Charles A.; Bowen, Professor H. Kent; Clark, Kim B.; Wheelwright, Steven C. (1994). The Perpetual Enterprise Machine: Seven Keys to Corporate Renewal Through Successful Product and Process Development. ISBN 9780195080520.

[comebackbook-3] Ingrassia, Paul; White, Joseph B. (18 October 1995). Comeback: The Fall & Rise of the American Automobile Industry. Simon & Schuster. p. 212–216. ISBN 978-0684804378.