The GM MR6/F40 six-speed manual transaxle was first developed for GM Europe by Saab Powertrain, for use in Saab and Opel applications. Originally a design developed by GM Powertrain Sweden Södertälje - Europe six-speed manual transaxle was originally built by

Saab Saab or SAAB may refer to: Brands and enterprises * Saab Group, a Swedish aerospace and defence company, formerly known as SAAB, and later as Saab AB ** Datasaab, a former computer company, started as spin off from Saab AB * Saab Automobile, a fo ...

in its transmission plant in Gothenburg, Sweden (2002-2003) but production was moved to Opel in

Rüsselsheim am Main Rüsselsheim am Main is the largest city in the Groß-Gerau district in the Rhein-Main region of Germany. It is one of seven special status cities (implementing several functions that counties normally provide) in Hessen and is located on the Mai ...

, Germany since 2004. Its first use in Europe was the new

Saab 9-3 The Saab 9-3 (pronounced ''nine-three'') is a compact executive car initially developed and manufactured by the Swedish automaker Saab. The first generation 9-3 (1998-2003) is based on the GM2900 platform, changing to the GM Epsilon platfor ...

2003-2011, while first use in North America was the same, in the Aero model. It is also used in 9-5 2010-2012 models.

Design

The F40 has a three-axis design, with first, second, fifth, and sixth gears on an output shaft behind and below the input shaft, and third and fourth gears are on an output shaft in front of and above the input shaft. Both output shaft pinions drive a helical gear with a conventional differential. The clutch is mounted on a dual-mass

flywheel A flywheel is a mechanical device which uses the conservation of angular momentum to store rotational energy; a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed. In particular, as ...

to dampen vibrations on whichever output shaft is idle depending upon which gear is selected. Triple-cone synchronizers are used on 1st and 2nd gears. These synchronizers have three friction surfaces, which increase their ability to transfer the flow of

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...

more smoothly from one gear to another. Synchronizers act as clutches to speed up or slow down the gearsets that are being shifted to, and greater friction area results in easier shifting for the driver. The 3rd, 4th, and reverse synchronizers are double-cone, while the 5th and 6th gear synchronizers are single-cone. All of the friction surfaces on the Synchronizer rings are sintered bronze. The ratios in the 6-speed are widely spaced for versatile performance and efficiency. To adapt the F40 to North American applications and maximize performance, 3rd through 6th gears have been changed to higher-ratio gears starting in 2007 model year. The ratio for 3rd gear is now 1.37:1, and the ratio for 4th gear is no longer an overdrive, with a new ratio of 1.05:1. The 5th gear ratio is 0.85:1 and the 6th gear ratio is 0.71:1. The addition of a ball-and-spring-type detent on the shift sleeve and detents on the shift rail assists the driver in shifting quicker. The detent raises the force required to move the shift lever which prevents excess movement of the shifter by the driver, and reduces the chance of double bump. Tension between the shift sleeve and the shift rail also prevents the sleeve from vibrating while in gear. The F40 is cast in aluminum, and weighs 124 pounds (56.2 kg). It has been certified for up to 295 ft-lb ( 400 Nm) of engine torque. The F40 MT2/MU9 uses a Castrol Burmah (BOT 0063) manual transmission fluid, or GM 88862472 gear oil. This gear oil is identified in GM documentation as a synthetic 75W-85 GL-4. No maintenance is required for normal operation. Gear ratios are as follows: Additional Final Drive ratios, 3.348, 3.909, 3.895, 3.091, and 4.176 are also available, but may be limited to a select few of gearsets.

Applications

* 2006

Pontiac G6 The Pontiac G6 is a mid-size car that was produced by General Motors under the Pontiac brand. It was introduced in 2004 for the 2005 model year to replace the Grand Am. The G6 shared the GM Epsilon platform with the Chevrolet Malibu, Saab 9-3 ...

GTP * 2007 Pontiac G6 GT *

Saab 9-5 The Saab 9-5 is an executive car that was produced by the Swedish automobile maker Saab from 1997 to 2012. The first generation 9-5 was introduced in 1997 for the 1998 model year, as the replacement to the Saab 9000. At the time, the car repr ...

Opel Cascada The Opel Cascada is a four-passenger fabric-roof convertible, manufactured and marketed by Opel across a single generation for model years 2013-2019, prioritizing year-round touring comfort over sportiness. Nearly identical badge engineered var ...

Opel Signum The Opel Signum is a large front-engine, front-wheel drive, five-passenger, five-door hatchback manufactured and marketed by the German car manufacturer Opel from 2003 to 2008, exclusively over a single generation, derived from the Opel Vect ...

Opel Vectra The Opel Vectra is a mid-size car ( large family car) that was engineered and produced by the German automaker Opel from 1988 until 2010. Available in saloon, hatchback and estate body styles, the Vectra was also sold by the Vauxhall marque ...

* Opel Antara *

Chevrolet Captiva The Chevrolet Captiva is a compact crossover SUV marketed by General Motors under their Chevrolet marque. The first generation was developed by GM Korea, based on the GM Theta platform and derived from the S3X concept car revealed in 2004. Rel ...

Opel Insignia The Opel Insignia is a large family car (D-segment in Europe) developed and produced by the German car manufacturer Opel since 2008. Taking its name from a 2003 concept car, the model line serves as the flagship Opel car line, slotted above the ...

* 2012

Opel Astra The Opel Astra is a compact car/small family car (C-segment) developed and produced by the German automaker Opel since 1991, currently at its sixth generation. It was first launched in September 1991 as a direct replacement to the Opel Kadett. ...

GTC/OPC * 2010

OPC * 2012-X

Chevrolet Cruze The Chevrolet Cruze is a compact car that is produced by General Motors since 2008. It was designated as a globally developed, designed, and manufactured four-door compact sedan, complemented by a five-door hatchback body variant from 2011, and ...

1.8L 6-speed Manual * 2011-13

Buick Regal The Buick Regal is a line of mid-size cars marketed by Buick since 1973. For nearly its entire production, the Regal has served as the premium mid-size/intermediate offering of the Buick product range. Introduced as a submodel of the Buick Centu ...

* 2013

Buick Verano The Buick Verano (Chinese: 威朗) is a compact car manufactured by SAIC-GM for the GM's Buick brand since 2010. It debuted at the North American International Auto Show on January 10, 2011, during a preview of Buick's then upcoming 2012 model. ...

* Alfa Romeo 156 * Alfa Romeo 166 *

Alfa Romeo 159 The Alfa Romeo 159 (Type 939) is a compact executive car manufactured and marketed by Alfa Romeo between 2004 and 2011. Introduced at the 2005 Geneva Motor Show, as a replacement for the 156, the 159 used the GM/Fiat Premium platform, sha ...

Alfa Romeo Brera The Alfa Romeo Brera and the Alfa Romeo Spider (Type 939) are mid-size sports cars using the GM/Fiat Premium platform, manufactured by Pininfarina and marketed by Alfa Romeo as a 2+2 coupé and roadster respectively. 12,488 units of the Spider ...

* Alfa Romeo Spider (939) 2006-2010 * Fiat Bravo (198) 2007-2014 * Fiat Ducato 2006- *

Lancia Thesis The Lancia Thesis (Type 841) is a full-size car produced by Italian automaker Lancia between 2001 and 2009. It was available with naturally aspirated and turbocharged engines ranging between 2.0 and 3.2 litres, in both straight-5 or V6 conf ...

* Lancia Delta (844) 2008-2014

European F40 version / Updates

2008 MR6/F40 (MU9) General Motors Powertrain-Europe F40 six-speed manual car transaxle 2008 Model Year Summary Carryover Features and Benefits from 2007 model year *DETENT SYSTEM FOR QUICKER AND EASIER SHIFTING The addition of a ball-and-spring-type detent on the shift sleeve and detents on the shift rail assists the driver in shifting quicker. The detent raises the force required to move the shift lever which prevents excess movement of the shifter by the driver, and reduces the chance of double bump. Tension between the shift sleeve and the shift rail also prevents the sleeve from vibrating while in gear. *GEAR RATIO CHANGES FOR QUICKER ACCELERATION To adapt the F40 to North American applications and maximize performance, 3rd through 6th gears have been changed to higher-ratio gears starting in 2007 model year. The ratio for 3rd gear is now 1.37:1, and the ratio for 4th gear is no longer an overdrive, with a new ratio of 1.05:1. The 5th gear ratio is 0.85:1 and the 6th gear ratio is 0.71:1. *LOW MAINTENANCE The MT2/MU9 uses a Castrol Burmah (BOT 0063) manual transmission fluid, and is validated as "fill-for-life". No maintenance is required for normal operation. *OVERVIEW Originally a design developed for Fiat, Opel and Saab applications, the F40 (MT2) is a GM Powertrain - Europe six-speed manual transaxle built in Russelsheim, Germany. Its first use in a North American application was the Pontiac G6 for the 2006 model year. It is also used in some Saab 9-3 and 9-5 models. It is a three-axis design, with first, second, fifth, and sixth gears on an output shaft behind and below the input shaft, and third and fourth gears are on an output shaft in front of and above the input shaft. Both output shaft pinions drive a helical gear with a conventional differential. The clutch is mounted on a dual-mass flywheel to dampen vibrations on whichever output shaft is idle depending upon which gear is selected. The F40 is cast in aluminum, and weighs 124 pounds (see specs). It has been certified for up to 400 Nm of engine torque. Triple-cone synchronizers are used on 1st and 2nd gears. These synchronizers have three friction surfaces, which increase their ability to transfer the flow of torque more smoothly from one gear to another. Synchronizers act as clutches to speed up or slow down the gearsets that are being shifted to, and greater friction area results in easier shifting for the driver. The 3rd, 4th, and reverse synchronizers are double-cone, while the 5th and 6th gear synchronizers are single-cone. All of the friction surfaces on the synchronizer rings are sintered bronze. The ratios in the 6-speed are widely spaced for versatile performance and efficiency.

References

{{Reflist * GM F40 transmission.GM F40 Transmission.
/ref> Although the MTF of the F40 transaxle is a fill for life, the actual capacity would be useful for those who have emptied theirs, e.g. when changing the clutch. This information is not shown in this document, but in the user manual of cars fitted with the F40 it is given as 2.8 litres.

External links

*http://gmpowertrain.com *http://www.opel-infos.de/getriebe/f40.html F40