4l85e Transmission

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  1. 4l85e Transmission Problems
  2. 4l85e Transmission Applications

4l80e 4l85e transmission parts & rebuild kits. 125 125c 200 200c 2004r th350 th400 700r4 4l60e 4l65e 4l70e 4l80e 4l85e 4t60 4t60e 4t65e cd4e transmission filler tube boot fits '69+ (1259475). The 4L85E is a 4-speed automatic transmission that was launched by General Motors in 2002. Like the 4L80E transmission, it was an upgrade to the TH400 three-speed transmission from GM. Hence, it can be considered as a TH400 with overdrive, a lockup torque converter, as well as advanced electronic controls. I’m trying to find the latest troubleshooting information for the HMMWV’s 4L80E and 4L85E transmissions. I'm hoping you can either help me out or point me in the right direction. The troubleshooting guide that I have is for older HMMWV models. I'm working on an M1152A1 up-armored HMMWV.

ManufacturerGeneral Motors
Body and chassis
Class4-speed longitudinalautomatic transmission
PredecessorTurbo-Hydramatic 3L80

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:



A Hydra-Matic 4L80 transmission at the Ypsilanti Automotive Heritage Museum

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[edit]

1-2 Solenoid2-3 Solenoid
1st GearOnOff
2nd GearOffOff
3rd GearOffOn
4th GearOnOn

No power results in 2nd Gear as 'Limp home mode'.


  • 1991–2013 Chevrolet C/K/Chevrolet Silverado/GMC Sierra 2500 & 3500
  • 1991–2013 Chevrolet/GMC Suburban/GMC Yukon XL 2500 & 3500
  • 1991–2009 Chevrolet Van/Chevrolet Express/GMC Savana 2500 & 3500
  • 2002–2006 Chevrolet Avalanche 2500 General Motors LS with L18 V8 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 with L18 V8


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]


  • Chevrolet Avalanche8.1 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.

See also[edit]


  1. ^Adcock, Ian (1992). Bentley Continental R. London: Osprey Publishing. p. 113. ISBN185532 260 9.
  2. ^'Archived copy'. Archived from the original on 2013-12-22. Retrieved December 22, 2013.CS1 maint: discouraged parameter (link) CS1 maint: archived copy as title (link)
  3. ^GM Powertrain. '07 Hydramatic 4L series'. General Motors. Retrieved January 5, 2014.CS1 maint: discouraged parameter (link)
  4. ^https://www.chevrolet.com/performance/transmissions/supermatic-4l85-e
  5. ^GM powertrain. '07 Hydramatic 4L Series Specs'. General Motors. Retrieved January 5, 2014.CS1 maint: discouraged parameter (link)
Retrieved from 'https://en.wikipedia.org/w/index.php?title=GM_4L80-E_transmission&oldid=1005272686'

4l85e Transmission Problems


Our 4L80e and 4L85E transmissions are one of the strongest in the world. We offer several options so you can have one custom built for you particular application. Whether it is Offroad racing, Kings of the Hammer, drag racing or just a custom street rod. We can build it. We also offer Full Manual valve bodies or stand alone transmission controllers to run them.


Our transmissions have withstood the punishment of 850 hp offroad racing trophy trucks and drag racers with 1400 hp.

Our stage 1 4L80E is adequate for the majority of street rods with 550 hp. If you need a stronger unit then you may need our stage 2. This transmission comes is capable of handling that 750 hp engine. Finally we have our stage 3, this is our strongest 4L85E transmission available. We use the 4L85E term from the GM naming convention. Our 4L85E comes with the Same 5 pinion gearsets, (unless upgraded) plus many more updates. It has withstood 1400 hp dragster, endured 850 hp offroad trophy trucks running in the Baja 1000. WE use OEM hard parts in all our 4L85E transmission builds along with the best performance components.

4l85e Transmission Applications

All of our transmissions come with an one year limited warranty (see details) . You can purchase the full electronic version or if you are on a budget choose our manual valve body (no computer needed). The full manual shifted valve body we offer comes at no additional cost on our stage two and three. We also have the best aftermarket 4L80E 4L85E transmission controllers available. Click on our transmssion controller link for more information.