Product Details

Vehicles equipped with 4L80E and 4L85E automatic transmissions often have complaints of no lock-up and no 4th, direct clutch slip, harsh shifts and no 4th, forward clutch slip at idle hot, reverse delay or bind up when hot as well as gear ratio and TCC slip codes.

These complaints usually occur when the transmission fluid is hot. Even with brand new sealing rings, after a few heat cycles, the OE style sealing rings no longer seal effectively, and they will leak causing the slippage. When the computer detects the slip, it then trips a diagnostic trouble code and disables both lock-up and 4th. Additionally, the computer then commands maximum line pressure which will cause harsh shift complaints and reduces or in some cases even completely cuts off lube oil.

Features and benefits:

These TransGo high temperature sealing rings and expanders are specially designed to resist hardening and shrinking over time, eliminating the leaks hot and the associated complaints. The kit also includes two shims to reduce end play to prevent shafts from rubbing and making metal as well as to help center the drum on the rings.

This Kit Corrects, Prevents, Reduces:

• TCC slip
• No lock-up and no 4th gear
• Direct clutch slip
• Forward clutch slip at idle when hot
• Delay or bind up reverse engagement when hot
• Codes 39, 68, 85, P0730, P0741, P0894 and P1870
• Includes:
• (2) Coast clutch high temperature sealing rings and expanders
• (4) Forward clutch high temperature sealing rings and expanders
• (4) Direct clutch high temperature sealing rings
• (2) End play adjustment shims

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

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

These HD sealing rings fit 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.