GM 4L80-E transmission
This article needs additional citations for verification. (January 2014) |
4L80-E/4L85-E | |
---|---|
Overview | |
Manufacturer | General Motors |
Production | 1991–2013 |
Body and chassis | |
Class | 4-speed longitudinal automatic transmission |
Chronology | |
Predecessor | Turbo-Hydramatic 3L80 |
Successor | 6L80/6L90 |
The 4L80-E (and similar 4L85-E) was a series of heavy-duty automatic transmissions from General Motors designed for longitudinal engine configurations. The 4L80-E was heavily based on the Turbo-Hydramatic 400 first produced in October 1963, adding electronic controls and an overdriven fourth gear. 4L80-Es were optioned only in Chevrolet/GMC pickups, Suburban 2500s, vans, and commercial vehicles, and the Hummer H1. It was also adopted by Rolls-Royce in 1991 and modified after extensive testing,[1] and used initially in the Bentley Continental R, and subsequently other Rolls-Royce and Bentley vehicles. The 4L80E and 4L85E were built at Willow Run Transmission in Ypsilanti, Michigan.
Gear ratios:
1 | 2 | 3 | 4 | R |
---|---|---|---|---|
2.48 | 1.48 | 1.00 | 0.75 | 2.07 |
4L80-E
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/09/Ypsilanti_Automotive_Heritage_Museum_May_2015_064_%28Hydra-Matic_4L80_transmission%29.jpg/220px-Ypsilanti_Automotive_Heritage_Museum_May_2015_064_%28Hydra-Matic_4L80_transmission%29.jpg)
The 4L80-E (RPO MT1) is rated to handle engines with up to 440 ft·lbf (597 N·m) of torque.[2] The 4L80-E is rated to max GVWR of 18,000 (Axle and vehicle dependent)[3]
The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. By activating and deactivating the solenoids in a predetermined pattern by the PCM, 4 distinct gear ratios can be achieved. The shift solenoid pattern, also sometimes referred to as solenoid firing order, is as follows;
Shift Solenoid Pattern
1-2 Solenoid | 2-3 Solenoid | |
1st Gear | On | Off |
2nd Gear | Off | Off |
3rd Gear | Off | On |
4th Gear | On | On |
No power results in 2nd Gear as 'Limp home mode'.
Applications
- 1991–2013 Chevrolet C/K/Chevrolet Silverado/GMC Sierra 2500 & 3500
- 1991–2013 Chevrolet/GMC Suburban/GMC Yukon 2500 & 3500
- 1991–2009 Chevrolet Van/Chevrolet Express/GMC Savana 2500 & 3500
- 2002–2006 Chevrolet Avalanche 2500 General Motors LS engine only
- 1992-2006 Hummer H1
- 1992–1998 Rolls-Royce Silver Spirit/Spur II, III, IV
- 1991–1992 Bentley Eight
- 1991–1997 Bentley Turbo R
- 1991–2002 Bentley Continental R/S/T
- 1999–2006 Bentley Arnage Red Label / Bentley Arnage R/RL/T
- 1993–1996 Jaguar XJS
- 1994–1997 Jaguar XJR
- 1993–1997 Jaguar XJ12 / Daimler Double Six
- 1996–1999 Aston Martin DB7
- 2000- 2006 Chevrolet HD trucks
4L85-E
The 4L85-E (RPO MN8) is rated to handle vehicles with up to 690 ft·lbf (935 N·m) of torque.[4] The 4L85E is rated to handle vehicles with a GVWR of up to 18,000 lbs (dependent on axle ratio and vehicle)[5]
Applications:
- Chevrolet Avalanche 8.1 Vortec only.
- Chevrolet Suburban 8.1 Vortec only.
- GMC Yukon XL 8.1 Vortec only.
- Chevrolet Express with Duramax Diesel or 8.1 Vortec 2500 & 3500 only.
- GMC Savana with Duramax Diesel or 8.1 Vortec only.
- Rally Fighter
See also
References
- ^ Adcock, Ian (1992). Bentley Continental R. London: Osprey Publishing. p. 113. ISBN 185532 260 9.
- ^ "Archived copy". Archived from the original on 2013-12-22. Retrieved December 22, 2013.
{{cite web}}
: CS1 maint: archived copy as title (link) - ^ GM Powertrain. "07 Hydramatic 4L series". General Motors. Retrieved January 5, 2014.
- ^ https://www.chevrolet.com/performance/transmissions/supermatic-4l85-e
- ^ GM powertrain. "07 Hydramatic 4L Series Specs". General Motors. Retrieved January 5, 2014.