The 4T40-E and 4T45-E are a series of automatic

transaxle A transaxle is a single mechanical device which combines the functions of an automobile's transmission, axle, and differential into one integrated assembly. It can be produced in both manual and automatic versions. Engine and drive at the ...

s from

General Motors The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...

. Designed for

transverse engine A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel. Many modern front-wheel drive vehicles use this engine mounting configuration. Most rear-wheel drive vehicles ...

configurations, the series includes 4 forward gears. The 4Txx family replaced the

Turbo-Hydramatic 125 {{Infobox automobile , image=Ypsilanti Automotive Heritage Museum May 2015 060 (1979-2001 Hydra-Matic 3T40 transmission).jpg , caption=A Hydra-Matic 3T40 transmission, produced between 1979 and 2001, at the Ypsilanti Automotive Heritage Museum , na ...

transverse three speed automatic introduced in 1980. The "-E" series is electronically controlled and features an automatic

overdrive Overdrive may refer to: Organizations * OverDrive, Inc., a digital distributor of entertainment media ** OverDrive Media Console, a media player developed by OverDrive, Inc. * Overdrive PC, a subsidiary of Velocity Micro Technology * Overdrive ...

with an electronically controlled

torque converter A torque converter is a type of fluid coupling that transfers rotating power from a prime mover, like an internal combustion engine, to a rotating driven load. In a vehicle with an automatic transmission, the torque converter connects the power ...

clutch. Since non-electronic versions of these transmissions do not exist, it is conventional to refer to these models as simply 4T40 and 4T45, leaving out the "-E". The 4T40 and 4T45 were assembled at Windsor Transmission in

Windsor, Ontario Windsor is a city in southwestern Ontario, Canada, on the south bank of the Detroit River directly across from Detroit, Michigan, United States. Geographically located within but administratively independent of Essex County, it is the souther ...

, Canada.

4T40

The "MN4" 4T40E is able to handle vehicles up to 4000 lb (1814 kg) GVWR. The final drive ratio can vary depending on the car's curb weight and engine power output. 3.91, 3.63, 3.29, 3.05, 3.69, and 3.42 are all of the available ratios used in the 4T40 (and 4T45) transmission; Made possible by using combinations selected from 3 different sprocket combinations (32/38, 35/35, 33/37) and 2 differentials (3.29, 3.05). It is designed for 1.5–3.1 L engines producing up to 190 ft·lbf (258 N·m) of torque. Gear ratios: Applications: *1999-2002

Daewoo Nubira Daewoo Nubira is a compact car which was produced by the South Korean automaker Daewoo from 1997 to 2002 as a 4-door sedan, 5-door hatchback and a 5-door station wagon. Development The Daewoo Nubira (J100 platform) was released in 1997 refle ...

*1999-2002

Daewoo Lanos The Daewoo Lanos is a compact / sedan car produced by the South Korean manufacturer Daewoo from 1997 to 2002, and thereafter produced under license agreements in various countries worldwide. It has also been marketed as the Daewoo Sens, ZAZ Sens ...

*1995–2005

Chevrolet Cavalier The Chevrolet Cavalier is a line of compact cars produced by Chevrolet. Serving as the replacement of the Chevrolet Monza, the Cavalier was the second Chevrolet model line to adopt front-wheel drive. Three versions of the Cavalier have been so ...

*1995-1996

Chevrolet Corsica The Chevrolet Corsica (named after Corsica, France) is a front-wheel drive compact car that was produced by Chevrolet from 1987 until 1996. The Corsica was built upon the L-body platform. It shared the L-body with the 2-door Beretta, and the reb ...

*1995–2005

Pontiac Sunfire The Pontiac Sunfire is a compact car by Pontiac that was introduced for the 1995 model year to replace the Sunbird. Not only was the name changed, but dramatic styling changes were included as well. The new styling was shared with the redesigned C ...

*1997–2003

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-drive ...

*1999–2005

Pontiac Grand Am The Pontiac Grand Am is a mid-size car and later a compact car that was produced by Pontiac. The Grand Am had two separate three-year runs in the 1970s: from 1973 to 1975, and again from 1978 to 1980. It was based on the GM A platform. Productio ...

*1999–2004

Oldsmobile Alero The Oldsmobile Alero is a midsize car that was produced by General Motors for its Oldsmobile division. Introduced in 1998 as a 1999 model, the Alero was the replacement for both the Achieva and Cutlass. The Alero was Oldsmobile's last new model ...

*1997–1999

Oldsmobile Cutlass The Oldsmobile Cutlass was a series of automobiles produced by General Motors' Oldsmobile division between 1961 and 1999. At its introduction, the Cutlass was Oldsmobile's entry-level model; it began as a unibody compact car, but saw its greates ...

*2000-2005

Saturn L-Series The Saturn L series is a line of automobiles, sedans and station wagons that were made by Saturn Corporation in Wilmington, Delaware. Poor sales of the L-series cars caused GM to cancel the line for 2005. The first L-series car was built in May ...

4T45

Minor design changes provided the 4T40E an increased torque capacity, producing the 4T45E. The "MN5" 4T45E is able to handle vehicles up to 4,500 lb (2,041 kg) GVWR. Final drive ratios include 3.63, 3.29, 3.05, and 3.91. This same transmission is used in the Saturn Vue Green Line

hybrid vehicle A hybrid vehicle is one that uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids. The basic princip ...

with the addition of an auxiliary oil pump and hybrid-aware electronics. It is designed for 3.0–3.5 L engines producing up to 205 ft·lbf (278 N·m) of torque, but was also commonly mated to some versions of GM's 4-cylinder Ecotec line. The 4T45E came with two different bellhousing patterns, the GM Metric Pattern (for V6 Applications) and the GM Ecotec 4-Cylinder Pattern. Gear ratios: Applications: *3.63:1 **2005-2010

Chevrolet Cobalt The Chevrolet Cobalt is a compact car introduced by Chevrolet in 2004 for the 2005 model year. The Cobalt replaced both the Cavalier and the Toyota-based Geo/Chevrolet Prizm as Chevrolet's compact car. The Cobalt was available as both a coupe ...

**2005-2010

Pontiac Pursuit The Chevrolet Cobalt is a compact car introduced by Chevrolet in 2004 for the 2005 model year. The Cobalt replaced both the Cavalier and the Toyota-based Geo/Chevrolet Prizm as Chevrolet's compact car. The Cobalt was available as both a coupe a ...

**2004-2008

Pontiac Grand Prix The Grand Prix is a line of automobiles produced by the Pontiac Division of General Motors from 1962 until 2002 for coupes and 1989–2008 for sedans. First introduced as a full-size performance coupe for the 1962 model year, the model varied ...

**2005-2007

Saturn Ion The Saturn Ion is a compact car sold by Saturn between the 2003 and 2007 model years. It used the GM Delta platform. The Ion replaced the Saturn S-Series in 2002, and was replaced by the new Saturn Astra in 2008. Production of the Ion ended on Ma ...

Saturn Vue The Saturn Vue is a compact SUV that was sold and built by Saturn, and it was Saturn's best-selling model. It was the first vehicle to use the GM Theta platform when it was introduced in 2001 for the 2002 model year. The Vue was later facelifted ...

Green Line **

2.2 *3.05:1 **

3.4 **

3.5 **

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 ...

V6 ** Pontiac Grand Am SE & SE1 w/ LA1 3400 *3.29:1 **

Chevrolet Malibu Maxx 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-driv ...

3.5 **

Chevrolet HHR The Chevrolet HHR (an initialism for Heritage High Roof) is a retro-styled, high-roofed, five-door, five-passenger, front-wheel drive crossover designed by Bryan Nesbitt and launched by the American automaker Chevrolet at the 2005 Los Angeles A ...

SS **

GT **

GT & GT1 *3.91:1 **

base **

LS & LT **

References

*{{cite web, url=http://www.gm.com/company/gmability/adv_tech/100_news/hybridvue_10906.html, title= Saturn Vue Green Line Uses New, Less Complex Hybrid System, work=

press release, accessdate=January 9, 2006, archiveurl= https://web.archive.org/web/20060315174408/http://www.gm.com/company/gmability/adv_tech/100_news/hybridvue_10906.html, archivedate=March 15, 2006

4T40

4T45

References

See also