Product Details

Oregon Performance Transmission is proud to offer this master rebuild kit for the GM 4T80, 4T80E, MH1, 4 speed automatic transmission.

Covered makes: Buick, Cadillac, Oldsmobile, Pontiac

Year range: 1993-2011

This master rebuild kit contains the following items:

• Transtec overhaul gasket set
• Friction clutch plates
• Overdrive band
• All three fluid filters

The Transtec gasket set included in this overhaul banner box kit is the highest quality available. The set includes every rubber seal, paper gasket, O-ring, sealing rings, and metal clad seals that you will need to complete your rebuild. The Transtec gasket sets are considered a premium kit, with the better Duraprene pan gasket, and higher quality gaskets and seals throughout.

Additionally, you can add the following upgrades to this overhaul rebuild kit:

• Steel plates (*pictured)
• Full bushing set (*pictured)
• Low-Reverse band (*pictured)
• Molded – bonded rubber piston set (*pictured)
• Input-Forward sprag – 36 element
• Low roller clutch – 18 rollers
• Drive chain – BorgWarner HV038 – 1” wide style only
• Sonnax boost valve and sleeve, 72754-01K
• ATSG rebuild manual on CD-ROM
• Assembly Grease - Lubegard, Life Smart Blend, or Transjel
• Platinum Lubegard - Insider tip: Many shops use this synthetic supplement in every freshly rebuilt transmission to keep them on the road past the warranty.

This transmission is known by multiple names including 4T80, 4T80E, MH1, and was fitted into the following applications:

Buick:

• Lucerne, 4.6L, 2006-2011

Cadillac:

• Allante, 1993
• DeVille, 4.6L Northstar, 1994-2005
• DTS, 4.6L, 2006-2011
• Eldorado, 4.6L Northstar, 1993-2003
• Seville, 4.6L Northstar, 1993-2004

Oldsmobile:

• Aurora, 4.0L, 1995-2003

Pontiac:

• Bonneville, 4.6L, 2004-2005

This overhaul rebuild box kit fits the following years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, and 2011.