National 710902 Transfer Case Output Shaft Seal - Rear

Transfer Case Output Shaft Seal for Ram and Dodge

National 710902 is a transfer case output shaft seal built for rear-position applications on select Ram and Dodge trucks with New Process 271 or 273 transfer cases. It uses a fluoro-elastomer sealing material and a counter-clockwise spiral lip design to help maintain a tight seal at the output shaft.

• Transfer case output shaft seal / oil seal
• Inside diameter: 2.300 in. / 58.420 mm
• Outside diameter: 3.330 in. / 84.579 mm
• Flanged outside diameter: 3.858 in. / 98.000 mm
• Thickness: 0.425 in. / 10.795 mm
• Overall width with side lip: 1.969 in. / 50.000 mm
• Housing bore: 3.322 in. / 84.379 mm
• Fluoro-elastomer sealing material for demanding driveline service
• Counter-clockwise spiral lip design

Detailed Product Overview

National 710902 is engineered for the transfer case output shaft area where sealing accuracy matters. The seal dimensions, including the 2.300-inch shaft size and 3.330-inch outside diameter, support a precise fit in the housing bore, while the fluoro-elastomer construction is selected for durability in driveline environments. This part number is commonly searched as a transfer case output shaft seal for Ram 2500, Ram 3500, and Dodge Ram 1500 rear applications.

This part cross-references Timken SL260034 and Remy 23000 for the same application. National 710902 is part of the 710900 series and is backed by National’s long-standing sealing expertise developed over more than 75 years.

Vehicle Fitment

• Fits 2011-2012 Ram 2500, rear, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed.
• Fits 2011-2012 Ram 2500, rear, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed.
• Fits 2011-2012 Ram 3500, rear, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed.
• Fits 2011-2012 Ram 3500, rear, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed.
• Fits 2003-2010 Dodge Ram 2500, rear, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed.
• Fits 2003-2010 Dodge Ram 2500, rear, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed.
• Fits 2003-2010 Dodge Ram 3500, rear, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed.
• Fits 2003-2010 Dodge Ram 3500, rear, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed.
• Fits 2007 Dodge Ram 1500, rear, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed.

Common Repair Uses

• Rear transfer case fluid seepage at the output shaft
• Oil leakage around the transfer case bearing area
• Seal wear from driveline rotation and heat exposure
• Service replacement during transfer case repair on Ram 2500 and Ram 3500 trucks
• Leak correction on Dodge Ram 1500 rear transfer case applications

Installation Notes and Tips

Verify the transfer case type, shaft diameter, and housing bore before installation. Clean the sealing surface thoroughly and inspect the shaft for grooves or damage that could affect sealing performance. Confirm the application details for New Process 271 or 273 transfer cases on Ram and Dodge trucks before final assembly.

Quality Assurance

National has a long history in sealing systems and develops products for modern vehicle service needs. National 710902 is built as a precision oil seal for transfer case output shaft applications and is identified by part number 710902.