National 710874 Drive Axle Shaft Seal - Front

National 710874 Drive Axle Shaft Seal

National 710874 is a drive axle shaft seal built for front differential applications that require a precise sealing surface and stable fit. It is a direct-fit oil seal for select Ram and Dodge Ram front axle setups, including Ram 2500 and Ram 3500 models with the specified AAM axle and 9.25" ring gear configuration.

Key Features

• Part number: 710874
• Part description: oil seal
• Material: fluoro-elastomer
• Inside diameter: 1.453 in. / 36.900 mm
• Outside diameter: 2.851 in. / 72.410 mm
• Housing bore: 2.843 in. / 72.200 mm
• Thickness/width: 1.268 in. / 32.200 mm
• Series: 710800
• Designed for front driveline and axle sealing applications

Detailed Description

National 710874 is engineered as a front drive axle shaft seal for vehicles that need dependable sealing at the differential area. The fluoro-elastomer construction is selected for sealing performance in demanding driveline environments, while the listed dimensions help support proper housing and shaft fitment. This seal is a strong match for Ram 2500 front applications and Dodge Ram 2500, Dodge Ram 3500, and Dodge Ram 1500 front axle configurations listed below. This part cross-references Timken SL260175 for the same application.

Vehicle Fitment

• Fits 2018-2020 Ram 2500, Front
• Fits 2011-2017 Ram 2500, Front. Notes: Fits Differential Pinion Bearing with 9.25" Ring Gear and AAM Axle, Independent Front Suspension.
• Fits 2011-2017 Ram 3500, Front. Notes: Fits Differential Pinion Bearing with 9.25" Ring Gear and AAM Axle, Independent Front Suspension.
• Fits 2003-2010 Dodge Ram 2500, Front. Notes: Fits Differential Pinion Bearing with 9.25" Ring Gear and AAM Axle, Independent Front Suspension.
• Fits 2003-2010 Dodge Ram 3500, Front. Notes: Fits Differential Pinion Bearing with 9.25" Ring Gear and AAM Axle, Independent Front Suspension.
• Fits 2006-2008 Dodge Ram 1500, Front. Notes: Fits Differential Pinion Bearing with 9.25" Ring Gear and AAM Axle, Independent Front Suspension.

Common Uses

• Front axle oil leakage at the differential seal area
• Seepage around the axle shaft or pinion bearing housing
• Seal replacement during front differential service
• Restoring proper fluid retention in AAM front axle assemblies
• Addressing wear-related sealing loss on Ram 2500, Ram 3500, and Dodge Ram front driveline systems

Installation Notes and Tips

Verify shaft diameter, housing bore, and application details before installation. Clean the sealing surface and inspect the axle shaft, bearing area, and housing for wear or scoring that could affect seal performance. Confirm the front axle configuration matches the listed Ram and Dodge Ram fitment, including the 9.25" ring gear and AAM axle notes where specified. Use proper seal installation practices to avoid distortion during seating.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle applications. The 710874 is built to the dimensional and material specifications listed above for consistent fitment in the confirmed front axle applications.