GM 4T80 transmission

Last updated
4T80-E
Ypsilanti Automotive Heritage Museum May 2015 065 (Hydra-Matic 4T80 transmission).jpg
A Hydra-Matic 4T80 transmission at the Ypsilanti Automotive Heritage Museum
Overview
Manufacturer General Motors
Production1993–2011
Body and chassis
Class 4-speed transverse automatic transmission
Chronology
Predecessor Turbo-Hydramatic 125
Successor 6T70

The 4T80E is a series of automatic transmissions from General Motors. Designed for transverse engine configurations, the series includes 4 forward gears. The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the 1980 model year "X" body.

Contents

The 4T80-E transmission is electronically controlled and features an automatic overdrive transaxle with an electronically controlled torque converter clutch. The 4T80 originally used a viscous clutch, but this was changed in 2005 to ECCC.

The 4T80 is built at Willow Run Transmission in Ypsilanti, Michigan.

4T80-E

The "MH1" 4T80-E is able to handle vehicles up to 8000 lb (3628.74 kg) GVWR. The final drive ratio is 3.11:1, 3.48:1, or 3.71:1. The 4T80 uses a viscous torque converter clutch, which was replaced with EC3 (electronically controlled converter clutch) in 2005. Transmission broadcast codes in 2005 for the ECCC transmission are 5ABN and 5MMN.

The 4T80-E is a hydramatic transmission and was developed for use with V8 front-wheel-drive cars, specifically for the Cadillac Northstar engine. It was designed with extreme power handling capabilities at the time. The 4T80-E debuted in the Cadillac Allanté in 1993 along with the Northstar Double Overhead Camshaft (DOHC) V8. It reportedly cost 80% more than a similar GM 4T60 transmission and weighed 60 lb (27 kg) more.

This transaxle has been used in many of GM's front drive large sedans. The Cadillac Division had exclusive usage of the 4T80-E until the 1995 Oldsmobile Aurora debuted. The Aurora had the 4.0L version of the Northstar V8 coupled to a 4T80-E. It wasn't until 2004 that Pontiac got usage of this transaxle in the Bonneville GXP which employed a 275 horsepower version of the Northstar 4.6L V8.

The 4T80-E was last used in 2011 on the Cadillac DTS and the Buick Lucerne (when equipped with the 4.6L Northstar).

Gear ratios:

1234R
2.961.6261.000.6812.13

Applications:

Related Research Articles

<span class="mw-page-title-main">Cadillac</span> Luxury car manufacturing division of General Motors

The Cadillac Motor Car Division is a division of the American automobile manufacturer General Motors (GM) that designs and builds luxury vehicles. Its major markets are the United States, Canada and China. Cadillac models are distributed in 34 additional markets worldwide. Historically, Cadillac automobiles were at the top of the luxury field within the United States, but have been outsold by European luxury brands including BMW and Mercedes since the 2000s. In 2019, Cadillac sold 390,458 vehicles worldwide, a record for the brand.

<span class="mw-page-title-main">Pontiac (automobile)</span> Discontinued automobile brand owned by General Motors

Pontiac, or formally the Pontiac Motor Division of General Motors, was an American automobile brand owned, manufactured, and commercialized by General Motors. Introduced as a companion make for GM's more expensive line of Oakland automobiles, Pontiac overtook Oakland in popularity and supplanted its parent brand entirely by 1933.

<span class="mw-page-title-main">Pontiac Grand Prix</span> Automobile model made by Pontiac

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.

<span class="mw-page-title-main">Pontiac Bonneville</span> Motor vehicle

The Pontiac Bonneville is an automobile built by Pontiac from 1957 until 2005. Bonnevilles were full-sized, with the exception of a brief period of mid-size between 1982 and 1986. The brand was introduced as a limited production performance convertible during the 1957 model year. The Bonneville, and its platform partner, the Grand Ville, are some of the largest Pontiacs ever built; in station wagon body styles they reached just over 230 inches (5.8 m) long, and at 5,000 pounds (2,300 kg) and more were also some of the heaviest cars produced at the time.

<span class="mw-page-title-main">Oldsmobile Aurora</span> Motor vehicle

The Oldsmobile Aurora is a luxury sedan, manufactured and marketed by General Motors from 1994 until 2003 over two generations — sharing platforms with Buick Riviera and using the Cadillac-derived G platform. At the time of production, the Aurora was the flagship vehicle in the Oldsmobile lineup. It originated as the 1989 Oldsmobile tube car concept.

<span class="mw-page-title-main">Northstar engine series</span> Family of high performance 90° V engines produced by General Motors

The Northstar engine is a family of high-performance 90° V engines produced by General Motors between 1993 and 2011. Regarded as GM's most technically complex engine, the original double overhead cam, four valve per cylinder, aluminum block/aluminum head V8 design was developed by Oldsmobile R&D, but is most associated with Cadillac's Northstar series.

<span class="mw-page-title-main">General Motors Y platform</span>

The Y platform, or Y body, designation has been used twice by the General Motors Corporation to describe a series of vehicles all built on the same basic body and sharing many parts and characteristics. The first was for a group of entry-level compacts including the conventional front-engine compacts built by GM divisions Buick, Oldsmobile and Pontiac from 1961 to 1963. The second, and current, incarnation is used for a high-end rear-wheel drive sports-car platform from the 1970s through the 2000s.

<span class="mw-page-title-main">Oldsmobile V8 engine</span> Reciprocating internal combustion engine

The Oldsmobile V8, also referred to as the Rocket, is series of engines that was produced by Oldsmobile from 1949 until 1990. The Rocket, along with the 1949 Cadillac V8, were the first post-war OHV crossflow cylinder head V8 engines produced by General Motors. Like all other GM divisions, Olds continued building its own V8 engine family for decades, adopting the corporate Chevrolet 350 small-block and Cadillac Northstar engine only in the 1990s. All Oldsmobile V8s were manufactured at plants in Lansing, Michigan while the engine block and cylinder heads were cast at Saginaw Metal Casting Operations.

<span class="mw-page-title-main">Cadillac V8 engine</span> Reciprocating internal combustion engine

The term Cadillac V8 may refer to any of a number of V8 engines produced by the Cadillac Division of General Motors since it pioneered the first such mass-produced engine in 1914.

<span class="mw-page-title-main">Hydramatic</span> Automatic transmission

Hydramatic is an automatic transmission developed by both General Motors' Cadillac and Oldsmobile divisions. Introduced in 1939 for the 1940 model year vehicles, the Hydramatic was the first mass-produced fully-automatic transmission developed for passenger automobile use.

Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse.

Roto Hydramatic was an automatic transmission built by General Motors and used in some Oldsmobile, Pontiac and Holden models between 1961 and 1965. It was based on the earlier, four-speed Hydramatic, but was more compact, providing only three forward speeds plus a small 8" fluid coupling with a stator inside of the fluid coupling. Oldsmobile, one of the companies that used this transmission in some of its cars, called the fluid couplings stator the "Accel-A-Rotor." The lightweight, aluminum-cased transmission was sometimes nicknamed the "Slim Jim." HydraMatic Division calls the Roto a four-range, three-gear HydraMatic.

Linden Assembly was a General Motors automobile factory in Linden, New Jersey, United States. The plant operated from 1937 to 2005 and made cars, trucks and SUVs for various GM automotive divisions.

The Super Turbine 300 was a two-speed automatic transmission built by General Motors. It was used in various Buick, Oldsmobile, and Pontiac models from 1964-1969. It was the same transmission marketed under different brand names by each division including ST-300 by Buick, Jetaway by Olds and simply Automatic by Pontiac.

<span class="mw-page-title-main">Turbo-Hydramatic 125</span> Motor vehicle

The Turbo-Hydramatic 125 was the first in a line of automatic transmissions from General Motors designed for transverse engine application. Introduced in 1980, the line evolved into today's 4T40/45/65/80 line.

The 4T60-E is a series of automatic transmissions from General Motors. Designed for transverse engine configurations, the series includes 4 forward gears. The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the late 1970s.

<span class="mw-page-title-main">Turbo-Hydramatic 425</span> Motor vehicle

Turbo-Hydramatic 425 was an automatic transmission developed and produced by General Motors. The THM425 was a derivative of the THM400; most parts directly interchange and some others will interchange with minor modifications. The internal parts spin the opposite direction in the THM425; the helical angle of the planetary gears is "reversed" and the one-way clutches freewheel in the opposite direction, for example. The THM425 was developed for the 1966 Oldsmobile Toronado and the 1967 Cadillac Eldorado. A lighter-duty transmission known as the THM325 replaced the THM425 in both car lines after the 1978 model year. 1979 and later longitudinal engine front-wheel drive vehicles used the THM325. The THM325 became the THM325-4L with an overdrive added in 1982, but all vehicles using this transmission switched to more-conventional transverse engine mounting in 1986. Bellhousing pattern used the 1967-90 Buick-Oldsmobile-Pontiac-Cadillac V8 pattern throughout its entire lifecycle.

<span class="mw-page-title-main">Cadillac High Technology engine</span> Reciprocating internal combustion engine

The Cadillac High Technology Engine was a V8 engine produced by the Cadillac division of General Motors from 1982 to 1995.

References

See also