National 710682 Transfer Case Output Shaft Seal - Front

Transfer Case Output Shaft Seal for 4WD Applications

National 710682 is a metric transfer case output shaft seal built for front-position applications in a wide range of full-time 4WD vehicles. It uses fluoro-elastomer sealing material to help maintain a tight seal at the output shaft and housing bore where transfer case fluid retention matters most.

With OE-style dimensions and broad interchange coverage, this seal is a direct-fit option for many Cadillac, Chevrolet, GMC, Kia, Hummer, and Hyundai transfer case applications. If you are servicing a Borg-Warner-equipped drivetrain, National 710682 provides the size and material match needed for a proper repair.

Key Features

• Transfer case output shaft seal for front-position applications
• National part number 710682
• Fluoro-elastomer sealing material for fluid resistance
• Metric dimensions for accurate housing and shaft fit
• Inside diameter: 1.732 in. / 44.000 mm
• Outside diameter: 2.764 in. / 70.200 mm
• Housing bore: 2.756 in. / 70.000 mm
• Width: 0.461 in. / 11.700 mm
• Overall width with side lip: 0.614 in. / 15.600 mm
• Flanged outside diameter: 3.000 in. / 76.200 mm

Detailed Description

National 710682 is an oil seal for transfer case output shaft service, engineered around metric sizing and a Type 74 profile. The seal’s fluoro-elastomer construction is selected for sealing performance in drivetrain environments where heat and fluid exposure are common. Its dimensions, including the 44 mm shaft size and 70 mm housing bore, make it a precise replacement for many Borg-Warner transfer case applications.

This part cross-references SKF 17348A for the same application. National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on drivetrain sealing accuracy. It is a strong match for service work on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade when the listed transfer case and position match.

What It Helps Address

• Transfer case fluid leakage at the output shaft
• Wet or contaminated transfer case housing areas
• Seal wear from age, heat, and drivetrain movement
• Loss of sealing integrity around the shaft and bore
• Service needs on Borg-Warner 4473, 4481, 4482, 4484, 4485, 4424, and 4428 transfer case applications

Installation Notes and Tips

Verify the transfer case model, shaft diameter, housing bore, and position before installation. This seal is listed for front and N/A positions depending on the vehicle application, so match the fitment notes carefully. Clean the sealing surface, inspect the shaft for wear or grooves, and confirm the seal seats evenly in the bore to avoid premature leakage.

Compatible vehicle examples include Fits 2007-2014 Cadillac Escalade, Front; Fits 2009-2014 Chevrolet Silverado 1500, Front; and Fits 2007-2014 GMC Yukon, Front. Additional coverage includes Fits 2003-2009 Hummer H2, Front and Fits 2003-2009 Kia Sorento, N/A.

Quality Assurance

National is a long-established sealing brand with a reputation built on drivetrain and engine sealing products. Part number 710682 is manufactured to metric specifications and supported by broad interchange references, including National 710682 and SKF 17348A, to help confirm application matching during service.