This article includes a list of general references, but it lacks sufficient corresponding inline citations .(April 2019) |
4T80-E | |
---|---|
Overview | |
Manufacturer | General Motors |
Production | 1993–2011 |
Body and chassis | |
Class | 4-speed transverse automatic transmission |
Chronology | |
Predecessor | Turbo-Hydramatic 125 |
Successor | 6T70 |
The 4T80E is a series of front wheel drive fully automatic transmissions from General Motors. Designed for transverse engine configurations, the series includes 4 gear bearing overdrive [1] [2] 2 electronic shift solenoids, and electronic force motor to control line pressure. [3]
The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the 1980 model year "X" body.
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. [1] [4] [2] [3]
The 4T80 is built at Willow Run Transmission in Ypsilanti, Michigan.
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. [1]
The 4T80-E is a hydramatic transmission and was developed for use with V8 front-wheel-drive cars, and at the time exclusively the Cadillac Northstar engine. [3] 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. [5]
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 [6] (may not be true) . 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). [7]
Gear ratios:
1 | 2 | 3 | 4 | R |
---|---|---|---|---|
2.96 | 1.626 | 1.00 | 0.681 | 2.13 |
the transmission had no performance parts, causing stress at over 300 hp [4]
and in some use cenarios, faulty seals will degrade the entire transmission [9]
most of these where fixed in the later models [10]
The Oldsmobile Toronado is a personal luxury car manufactured and marketed by the Oldsmobile division of General Motors from 1966 to 1992 over four generations. The Toronado was noted for its transaxle version of GM's Turbo-Hydramatic transmission, making it the first U.S.-produced front-wheel drive automobile since the demise of the Cord 810/812 in 1937.
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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.
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.
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The Cadillac DTS is a full-size car that was built by the American company Cadillac from 2005 until May 2011. It is a four-door sedan that comes in five- or six-seat variants. The DTS debuted at the 2005 Chicago Auto Show and was manufactured at GM's Detroit/Hamtramck Assembly factory. It uses GM's G-platform for front-engine, front-wheel-drive automobiles. The DTS was a very mildly revised iteration of the eighth-generation Deville, using the brand's new naming convention, set by the CTS and STS. Writing for the Los Angeles Times, noted reviewer Warren Brown called the DTS "a large, exceptionally comfortable front-wheel-drive luxury sedan." The nameplate DTS is an acronym for DeVille Touring Sedan.
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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.
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