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

automatic Automatic may refer to: Music Bands * Automatic (Australian band), Australian rock band * Automatic (American band), American rock band * The Automatic, a Welsh alternative rock band Albums * ''Automatic'' (Jack Bruce album), a 1983 el ...

transaxle A transaxle is single mechanical device which combines the functions of an automobile's transmission (mechanics), transmission, axle, and differential (mechanics), differential into one integrated assembly. It can be produced in both manual tra ...

s from

General Motors General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing f ...

. 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 arrangement. Most rear-wheel drive vehicles use a longitudinal ...

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 , n ...

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

with an electronically controlled

torque converter A torque converter is a device, usually implemented as 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 ...

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. It is situated on the south bank of the Detroit River directly across from the U.S city of Detroit, Detroit, Michigan. Geographically located within but administratively independent of Esse ...

, 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 reflec ...

*1999-2002

Daewoo Lanos The Daewoo Lanos is a compact hatchback / 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 ...

*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 sold, ...

*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 (automobile), Pontiac that was introduced for the 1995 model year to replace the Pontiac Sunbird, Sunbird. Not only was the name changed, but dramatic styling changes were included as well. The new s ...

*1997–2003

Chevrolet Malibu The Chevrolet Malibu is a mid-size car that was manufactured and marketed by Chevrolet from 1964 to 1983 and from 1997 to 2025. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-w ...

*1999–2005

Pontiac Grand Am The Pontiac Grand Am is a car model that Pontiac (automobile), Pontiac Division of General Motors produced in various years between 1973 and 2005. The first and second generations were Rear-wheel drive, RWD mid-size cars built on the Pontiac Leman ...

*1999–2004

Oldsmobile Alero The Oldsmobile Alero is a compact 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 greatest ...

*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 for 2000–2005 model years. Poor sales of the L-Series cars caused GM to cancel the line for 2005. The first L- ...

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. Hybrid powertrai ...

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 a ...

**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 ...

2.2/2.4 **2006-2009

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 ...

2.4 **2005-2007 Saturn Ion **

Saturn Vue The Saturn Vue is a compact SUV that was built and marketed 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 facelifte ...

Green Line **

2.2 *3.05:1 ** 1999-2002

3.4 ** 1999-2005

SE & SE1 w/ LA1 3400 *3.29:1 **

Chevrolet Malibu Maxx The Chevrolet Malibu is a mid-size car that was manufactured and marketed by Chevrolet from 1964 to 1983 and from 1997 to 2025. The Malibu began as a trim-level of the Chevrolet Chevelle, becoming its own model line in 1978. Originally a rear-w ...

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 wagon designed by Bryan Nesbitt and launched by the American automaker Chevrolet at the 2005 Los Angeles Aut ...

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