The Hydra-Matic 6T40 and similar 6T45, 6T50 and 6T30 are
transversely-mounted six speed
automatic transmission
An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving ...
s produced by
General Motors. The 6T40, referred to in GM inner circles as the GF6, made its debut in the 2008
Chevrolet Malibu
The Chevrolet Malibu is a mid-size car manufactured and marketed by Chevrolet from 1964 to 1983 and again since 1997. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-wheel-dr ...
, available with the 2.4 L ''
LE5'' ''Ecotec'' engine making , and has since also been made available on the
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 ...
,
Daewoo Tosca
The Daewoo Tosca is a mid-size car designed by Daewoo in South Korea and marketed by Chevrolet as the Chevrolet Epica and Chevrolet Tosca, while Holden marketed it as the Holden Epica. Codenamed ''V250'', it replaces the Daewoo Magnus and its d ...
and
Buick LaCrosse
The Buick LaCrosse is a mid-size sedan manufactured and marketed by Buick since 2004. The LaCrosse is now in its third generation, slotted above the Buick Regal as the brand's flagship vehicle.
The first-generation LaCrosse replaced the Century ...
. It features clutch-to-clutch shifting, eliminating the bands used on older transmission designs. GM chose an "on-axis" design as opposed to folding the gearset behind the engine and transferring power through the use of a chain, as is used in most other GM front wheel drive transaxles.
Ford Motor Company
Ford Motor Company (commonly known as Ford) is an American multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobi ...
also produces their own variant, called the 6F35. The
Buick Encore uses the 6F35 mated to the 1.4 turbo.
The 6T45 differs from the 6T40 in its use of heavier-duty components, allowing it to handle engines with greater torque. The 6T40 and 6T50 are available in
front-wheel drive
Front-wheel drive (FWD) is a form of engine and transmission layout used in motor vehicles, where the engine drives the front wheels only. Most modern front-wheel drive vehicles feature a transverse engine, rather than the conventional longitu ...
configuration only (MH8 and MUK), with the 6T40 also being paired with eAssist (MHH), but the 6T45 will be adaptable to both front-wheel drive (MH7) and
all-wheel drive
An all-wheel drive vehicle (AWD vehicle) is one with a powertrain capable of providing power to all its wheels, whether full-time or on-demand.
The most common forms of all-wheel drive are:
;1x1 : All unicycles Reflecting one axle with one w ...
(MHC). The 6T50 is available in front-wheel or all wheel drive as well. The transmission is based on the larger
6T70/75, and is produced at
Toledo, Ohio
Toledo ( ) is a city in and the county seat of Lucas County, Ohio, United States. A major Midwestern United States port city, Toledo is the fourth-most populous city in the state of Ohio, after Columbus, Cleveland, and Cincinnati, and according ...
, as well as in China. Since 2008, these transmissions have been produced by
GM Daewoo
GM Korea Company ( ko, 한국지엠주식회사) is the South Korean subsidiary of multinational corporation General Motors. GMK is also the third largest automobile manufacturer in South Korea. GM Korea's roots go back to the former Daewoo Mot ...
at the Boryeong Transmission Plant in
Boryeong
Boryeong (), commonly known as Daecheon, is a city in South Chungcheong Province, South Korea. It is located on the coast of the Yellow Sea. It lies on the Janghang Line railroad, which connects it to Seoul via the Gyeongbu Line. It is also conne ...
,
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eas ...
. The facility is currently capable of producing up to 300,000 Hydra-Matic six-speed automatic transmissions annually. The transmission is also produced in
Yantai
Yantai, formerly known as Chefoo, is a coastal prefecture-level city on the Shandong Peninsula in northeastern Shandong province of People's Republic of China. Lying on the southern coast of the Bohai Strait, Yantai borders Qingdao on the ...
, China.
6T30 is a recent more compact and lightweight variant used on
1.8 L engine equipped variants of the North American
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 ...
and
Chevrolet Sonic
The Chevrolet Aveo ( ) is a subcompact car (B-segment) marketed by General Motors since 2002. Originally marketed as the Daewoo Kalos, takeover of Daewoo Motors by General Motors (GM) also saw the car being marketed under seven brands ( Chevrole ...
. The 6T40 was still used in those models equipped with the
1.4 L turbocharged engine. GM lists the weight of the 6T30 with fluids at , while the 6T40/45/50 weigh between and .
GM launched the 6T35 250 nm, a higher torque variant of the 6T30, with the 2016 Cruze and its new 1.4 L turbocharged engine, saving space and approximately 24 lbs over the 6T40 used in the prior turbocharged Cruze.
Gear ratios
Gear ratios (6T40, 6T45):
Gear ratios (6T30, 6T35):
Applications
* 2008
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 ...
/
Daewoo Lacetti Premiere/
Holden Cruze
* 2008
Chevrolet Malibu
The Chevrolet Malibu is a mid-size car manufactured and marketed by Chevrolet from 1964 to 1983 and again since 1997. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-wheel-dr ...
* 2008
Daewoo Tosca
The Daewoo Tosca is a mid-size car designed by Daewoo in South Korea and marketed by Chevrolet as the Chevrolet Epica and Chevrolet Tosca, while Holden marketed it as the Holden Epica. Codenamed ''V250'', it replaces the Daewoo Magnus and its d ...
/
Chevrolet Epica
Epica or EPICA may refer to:
* Epica (band), a Dutch symphonic metal band
* ''Epica'' (Kamelot album), 2003
* ''Epica'' (Audiomachine album), 2012
* The European Project for Ice Coring in Antarctica (EPICA)
* The Epica Awards (International Adver ...
/
Chevrolet Tosca/
Holden Epica
* 2008
Buick LaCrosse
The Buick LaCrosse is a mid-size sedan manufactured and marketed by Buick since 2004. The LaCrosse is now in its third generation, slotted above the Buick Regal as the brand's flagship vehicle.
The first-generation LaCrosse replaced the Century ...
(China)
* 2009
Saturn Aura
The Saturn Aura is a four-door, five-passenger front engine/front-wheel drive mid-sized sedan manufactured and marketed by GM's Saturn subsidiary over a single generation from 2006–2009. The car launched one year before the seventh generatio ...
/
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 ...
(4-cylinder only)
* 2010-2017
Chevrolet Equinox
The Chevrolet Equinox is a series of crossover SUVs from Chevrolet introduced in 2004 for the 2005 model year. It replaces the North American Chevrolet Tracker and Chevrolet S-10 Blazer. The third-generation Equinox also replaced the first-g ...
(4 cylinder only)
* 2010-2017
GMC Terrain
The GMC Terrain is a crossover SUV by American manufacturer General Motors under its GMC marque. Sharing its platform with the Chevrolet Equinox, the first-generation Terrain was built on GM's Theta platform, while the second-generation model ...
(4 cylinder only)
* 2010
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. ...
/
Vauxhall Astra
The Vauxhall Astra is a compact car/small family car (C-segment) that has been sold by Vauxhall since 1980. It is currently produced at Ellesmere Port, Cheshire, England.
For its first two generations, the nameplate was applied to right-han ...
* 2010
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 ...
* 2011
Chevrolet Aveo
The Chevrolet Aveo ( ) is a subcompact car (B-segment) marketed by General Motors since 2002. Originally marketed as the Daewoo Kalos, takeover of Daewoo Motors by General Motors (GM) also saw the car being marketed under seven brands (Chevrolet, ...
* 2012
Buick LaCrosse
The Buick LaCrosse is a mid-size sedan manufactured and marketed by Buick since 2004. The LaCrosse is now in its third generation, slotted above the Buick Regal as the brand's flagship vehicle.
The first-generation LaCrosse replaced the Century ...
(USA) with
eAssist
* 2012
Chevrolet Sonic
The Chevrolet Aveo ( ) is a subcompact car (B-segment) marketed by General Motors since 2002. Originally marketed as the Daewoo Kalos, takeover of Daewoo Motors by General Motors (GM) also saw the car being marketed under seven brands ( Chevrole ...
* 2013
Chevrolet Trax
The Chevrolet Trax is a crossover SUV manufactured by General Motors and marketed under the Chevrolet brand since 2013. The first generation model was released globally in 2013 as the smallest, entry-level crossover SUV offering from the bran ...
(Korea)
* 2013
Buick Encore (U.S.)
* 2013
Chevrolet Captiva Sport (U.S.)
* 2014
Chevrolet Onix (Brazil)
* 2014
Chevrolet Malibu
The Chevrolet Malibu is a mid-size car manufactured and marketed by Chevrolet from 1964 to 1983 and again since 1997. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-wheel-dr ...
(USA)
* 2015
Chevrolet Malibu
The Chevrolet Malibu is a mid-size car manufactured and marketed by Chevrolet from 1964 to 1983 and again since 1997. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-wheel-dr ...
(USA)
See also
*
List of GM transmissions
General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. This list includes some GM transmissions.
Automatic transmissions
Early models
The GM Hydra-Matic was a success and installed in the majority of G ...
*
GM-Ford 6-speed automatic transmission
General Motors and Ford Motor Company cooperated in 2002 to create a new automatic transaxle, designed for transverse engine applications in cars. The companies jointly committed to investing US$720 million in their manufacturing plants to supp ...
References
*
* {{dead link, date=January 2017 , bot=InternetArchiveBot , fix-attempted=yes
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