FAG SS2859 Transfer Case Output Shaft Seal - Front

Transfer Case Output Shaft Seal for GM 4x4 Applications

The FAG SS2859 transfer case output shaft seal is built for GM trucks and SUVs that need a precise sealing surface at the transfer case output. With Viton sealing material, a metal spring design, and an auxiliary lip, it is specified to help keep contamination out and retain lubricant at the bearing and shaft interface.

Fits a wide range of Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and Cadillac Escalade 4x4 applications across 1997-2014 model years, including front and rear positions where listed.

Key Features

• Part number: SS2859
• Seal type: metal, spring, auxiliary lip
• Sealing material: Viton
• Bore diameter: 2.874 in. / 73 mm
• Seal outside diameter: 2.884 in. / 73.254 mm
• Seal width: 1.811 in. / 45.999 mm
• Engineered to help protect transfer case components from dirt, dust, and moisture
• Designed to help reduce grease loss over the service life of the bearing

Detailed Description

FAG SS2859 is a transfer case output shaft seal for GM driveline applications that require accurate dimensions and durable sealing performance. The Viton sealing material is selected for demanding operating conditions, while the metal case, spring tension, and auxiliary lip support consistent contact at the shaft. This seal is used in transfer case sealing systems where maintaining lubricant and excluding contamination are critical to long-term operation.

This part cross-references Bosch 18102 and National 710495 for the same application. Common search terms include transfer case output shaft seal for 2001-2007 Chevrolet Silverado 1500 front, 2001-2007 GMC Sierra 1500 front, and 2001-2007 Chevrolet Tahoe front. The FAG SS2859 also appears in fitments for Chevrolet Avalanche, Suburban, Silverado HD, GMC Yukon, and Cadillac Escalade models listed below.

What It Helps Address

• Transfer case fluid seepage at the output shaft
• Contamination from dirt, dust, and moisture entering the seal area
• Grease loss around the bearing and shaft interface
• Wear-related sealing issues in high-mileage 4x4 drivetrains
• Service replacement for worn or damaged transfer case seals

Installation Notes and Tips

Verify bore diameter, seal outside diameter, and seal width before installation. Confirm transfer case type and position, since this seal is listed for front and rear applications depending on vehicle and configuration. Match the vehicle’s transfer case code and notes carefully on Silverado, Sierra, Yukon, Tahoe, and Escalade models, especially where manual shift or active 2-speed transfer case notes are shown.

• Fits 2010-2014 GMC Yukon, rear
• Fits 2008 GMC Sierra 1500, front
• Fits 2008 GMC Yukon, front
• Fits 2008 GMC Yukon XL 1500, front
• Fits 2008 GMC Yukon XL 2500, front
• Fits 2007 Chevrolet Avalanche, front
• Fits 2001-2007 Chevrolet Silverado 1500, front
• Fits 2001-2007 Chevrolet Silverado 2500 HD, front
• Fits 2001-2007 Chevrolet Silverado 3500, front
• Fits 2001-2007 Chevrolet Suburban 1500, front
• Fits 2001-2007 Chevrolet Tahoe, front
• Fits 2001-2007 GMC Sierra 1500, front
• Fits 2001-2007 GMC Sierra 2500 HD, front
• Fits 2001-2007 GMC Yukon, front
• Fits 2001-2007 GMC Yukon XL 1500, front
• Fits 2000-2007 GMC Yukon XL 2500, front
• Fits 2002-2006 Cadillac Escalade, front
• Fits 2003-2006 Cadillac Escalade ESV, front
• Fits 2002-2006 Cadillac Escalade EXT, front
• Fits 1999-2000 Chevrolet Silverado 1500, front
• Fits 2000 Chevrolet Suburban 1500, front
• Fits 2000 Chevrolet Suburban 2500, front
• Fits 2000 Chevrolet Tahoe, front
• Fits 1999-2000 GMC C2500, front
• Fits 1999-2000 GMC K2500, front
• Fits 1999 Chevrolet C2500 Suburban, front
• Fits 1999 Chevrolet K2500 Suburban, front
• Fits 1998-1999 GMC K1500 Suburban, front

Quality Assurance

FAG specifies this seal using high-quality materials and application-based design standards to meet vehicle manufacturer requirements. The seal construction is selected for demanding wheel-end and driveline sealing environments where dimensional accuracy and contamination control matter.