The 4-speed General Motors 4L80E (MT1) automatic transmission was produced from 1991 to 2014 and was installed with high-performance diesel engines and V8 powertrains up to the 7.4-liter L29. This automatic transmission is familiar from the Chevrolet Express, Suburban, as well as Bentley and Rolls-Royce models.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 7.4 |
| Torque output, Nm | up to 600 |
| Recommended oil | ATF Dexron VI |
| Oil capacity, liter | 12.7 |
| Partial replacement, liter | 6.3 |
| Maintenance | every 80 000 km |
| Gearbox lifespan, km | ~350 000 km |
| Weight, kg | 115 |
Gear ratios GM 4L80E
Using the 2005 Chevrolet Express with a 6.0-liter engine as an example:
| Main | 3.73 |
| 1st | 2.482 |
| 2nd | 1.482 |
| 3rd | 1.000 |
| 4th | 0.750 |
| Reverse | 2.077 |
Using
The transmission was installed on:
- Aston Martin DB7 1 in 1994 – 1999;
- Bentley Arnage 1 (RBS) in 1998 – 2006;
- Bentley Continental R 1 in 1991 – 2003;
- Bentley Eight 1 in 1991 – 1992;
- Bentley Turbo R 1 in 1991 – 1997;
- Chevrolet Avalanche 1 (GMT805) in 2001 – 2005;
- Chevrolet C/K 4 (GMT400) in 1991 – 1999;
- Chevrolet Express 1 (GMT600) in 1995 – 2002;
- Chevrolet Express 2 (GMT610) in 2002 – 2009;
- Chevrolet Silverado 1 (GMT800) in 1998 – 2007;
- Chevrolet Silverado 2 (GMT901) in 2006 – 2013;
- Chevrolet Silverado HD 1 (GMT880) in 2000 – 2007;
- Chevrolet Suburban 8 (GMT410) in 1991 – 1999;
- Chevrolet Suburban 9 (GMT830) in 1999 – 2005;
- Chevrolet Suburban 10 (GMT931) in 2006 – 2013;
- Hummer H1 (HMC) in 1992 – 2006;
- GMC Savana 1 (GMT600) in 1995 – 2002;
- GMC Savana 2 (GMT610) in 2002 – 2009;
- GMC Sierra 1 (GMT400) in 1991 – 2000;
- GMC Sierra 2 (GMT800) in 1998 – 2007;
- GMC Sierra 3 (GMT902) in 2006 – 2013;
- GMC Sierra HD 2 (GMT880) in 2000 – 2007;
- GMC Yukon 1 (GMT430) in 1991 – 2000;
- GMC Yukon 2 (GMT820) in 2000 – 2006;
- GMC Yukon 3 (GMT922) in 2005 – 2014;
- Jaguar XJ 4 (XJ40) in 1992 – 1994;
- Jaguar XJ 5 (X300) in 1994 – 1997;
- Rolls-Royce Silver Spirit 2 in 1991 – 1992;
- Rolls-Royce Silver Spirit 3 in 1992 – 1995;
- Rolls-Royce Silver Spirit 4 in 1995 – 1999.
Disadvantages of the GM 4L80 gearbox
- This is a robust automatic transmission, and breakdowns only occur during long runs;
- Problems begin with slippage during shifts due to worn clutches;
- The main cause is worn bushings and the resulting drop in oil pressure;
- With frequent overheating of the automatic transmission, the service life of the bushings is reduced to 150,000-200,000 km;
- Also, high-mileage automatic transmissions are prone to frequent oil leaks at the seals.
