Rebuild manual for the GM 4L80E and 4L85E automatic transmission.

Product specifics:

• Publisher: ATSG – Automatic Transmission Service Group
• ATSG part number: 4L80E
• Book type: Rebuild and overhaul – Techtran manual
• Covered models: 4L80, 4L85, 4L80E, 4L85E
• Makes: Chevrolet, GMC, Hummer H1, Isuzu NPR, Jaguar, Aston Martin, Bentley, Rolls-Royce
• Year range: 1991-up
• Format: Paperback
• Pages: 120
• UPC: 852553006035
• Country of origin: USA

The blue cover 4L80E ATSG overhaul manual covers procedures and technical service information for transmission inspection, repair, dis-assembly, assembly, diagnosis, and troubleshooting.

This book contains detailed information regarding the following:

• Bushing locations
• Checkball locations
• Clutch clearance specifications
• Electrical volt and ohms information
• Endplay check and recommendations
• Exploded views
• Line pressure check procedures and specs
• Recommended tools list – Not all required
• Thrust washer locations
• Torque specifications
• Torrington bearing locations
• Transmission model application codes
• Trouble codes and fixes
• Trouble shooting
• Valve body assembly detail for valves and springs
• Much more…

The 4L80E and its variants were in production from 1991-2013 and can be identified by the 17 bolt oil pan and 4 forward gears.  Typically, this transmission is found in the heavier duty trucks and vans; mostly the 2500 and 3500 series.  It will also be found in the heavy half-ton, such as the 1500HD, SS, or Denali truck with the 6.0L

These transmissions can be found in the following vehicles; however, you should double check your application with the 16 bolt pan count and square shape.  It is common for similar vehicles to have multiple transmission options available from the factory.

• Aston Martin DB7 1996-1999
• Avalanche 3/4 ton 2002-2006
• Bentley 1991-2006 (confirm 4-speed with 17 bolt pan)
• Hummer H1 1991-2005
• Isuzu NPR gas engine 1990-2007
• Jaguar XJS, XJS-R, XJ12 1993-1998
• Motor Homes 1995-2005
• Rolls-Royce 1992-2003
• Sierra Pickup 1991-2013
• Silverado Pickup 1991-2013
• Suburban 6.0L 1996-2007
• Tahoe 6.0L, 8.1L 1995-2003
• GMC & Chevy Van 1991-2009
• Yukon XL 6.0L, 8.1L 1995-2003

This transmission is part of the Turbo-Hydramatic series and known by the following codes and model numbers: 4L80E, 4L80-E, MT1, 4L85E, 4L85-E, MN8

This automatic transmission rebuild guide covers the following years: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, and 2013.