Product Details

Transgo 4L80E Shift Kit Chevrolet GMC 4L85E 4L80-E 4L85-E Automatic Transmission 91-On. New Extreme Quality Boost Bushing with Matching Boost Valve. Corrects/Prevents/Reduces: High Pressure Parts Breakage; Has Boost Valve and Pressure Relief Valve; Direct Clutch Burnup; Soft 2-3 Slide-Bang 1-2; Low Pressure Due To Solenoid Filter Breakup. Missing shifts with no diagnostic codes.

The 4L80E and its variants were in production from 1991-2010 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

The 4L80E and 4L85E transmissions were found in the following GM labels and other brands; Chevrolet, Chevy, GMC, Hummer H1, Isuzu NPR, Jaguar, Aston Martin, Bentley, Rolls-Royce

These transmissions can be found in the following vehicles; however, you should double check your application with the 17-bolt pan count.  It is common for similar vehicles to have multiple transmission options available from the factory.

Chevrolet

• Avalanche 2500, 2002-2006
• Base Cab & Chassis, 2500, 3500, K2500, K3500, 1991-2009
• Express Van, 2500, 3500
• Silverado, Cheyenne, 2500, 3500, 2500 HD, K2500, K3500, 1991-2007
• Suburban, 2500 1996-2007
• Tahoe 6.0L, 8.1L 1995-2003

GMC

• Base Cab & Chassis, 2500, 3500, C2500, C3500, 1991-2009
• Savana Van, 2500, 3500
• Sierra, 2500, 3500, 2500HD, C2500, C3500, 1991-2007
• Yukon XL 6.0L, 8.1L 1995-2003

Hummer

• H1 1991-2005

Other

• Aston Martin DB7 1996-1999
• Bentley 1991-2006 (confirm 4-speed with 17 bolt pan)
• Isuzu NPR gas engine 1990-2007
• Jaguar XJS, XJS-R, XJ12 1993-1998
• Motor Homes 1995-2005
• Rolls-Royce 1992-2003

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

This shift kit fits 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.