National 710942 Transfer Case Output Shaft Seal - Rear

Transfer Case Output Shaft Seal for Ram 2500/3500

The National 710942 transfer case output shaft seal is built for rear transfer case sealing on select Ram heavy-duty trucks. It uses a fluoro-elastomer sealing material and a bi-directional lip design to help maintain a tight seal at the output shaft.

Compatible with 2012-2019 Ram 2500 and 2012-2019 Ram 3500 applications with Borg-Warner 4446 transfer case and part-time 4WD, plus 2019 Ram 3500 with Borg-Warner 4448 transfer case and part-time 4WD.

• National part number 710942
• Transfer case output shaft seal for rear position
• Fluoro-elastomer material for sealing performance
• Bi-directional lip design
• Metric dimensions: 55.000 mm shaft ID, 84.700 mm OD, 12.000 mm width
• Housing bore: 84.500 mm
• Overall width with side lip: 22.000 mm

Detailed Product Overview

National 710942 is an oil seal for the transfer case output shaft, engineered around precise metric dimensions for a proper housing and shaft interface. The seal measures 55.000 mm inside diameter, 84.700 mm outside diameter, and 12.000 mm thickness, with an overall width of 22.000 mm including the side lip. Its fluoro-elastomer sealing material is selected for demanding drivetrain environments where heat and fluid exposure are common. This part cross-references SKF 20696A for the same application.

Use National 710942 when servicing the rear transfer case output on Ram 2500 and Ram 3500 trucks with the listed Borg-Warner transfer case configurations. The part number 710942 is also a useful reference when matching transfer case output shaft seal dimensions during drivetrain repair.

What This Seal Helps Address

• Transfer case fluid seepage at the output shaft
• Oil residue around the rear transfer case housing
• Seal wear from heat, rotation, and fluid exposure
• Loss of sealing integrity at the shaft-to-housing interface
• Maintenance replacement during transfer case service

Installation Notes and Tips

Verify the transfer case model, shaft diameter, housing bore, and rear position before installation. Clean the sealing surface and inspect the shaft for grooves or damage that could affect seal life. Confirm the application against the vehicle’s transfer case configuration, especially on Ram 2500 and Ram 3500 trucks with Borg-Warner 4446 or 4448 units.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop designs for modern vehicle systems. The 710942 reflects that focus with a precision-fit oil seal construction for drivetrain service.