National 710476 Differential Pinion Seal - Front Outer

National 710476 Differential Pinion Seal Overview

The National 710476 differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed for select Chrysler, Dodge, Mitsubishi, and Ram models, this oil seal helps maintain proper lubrication and prevent leaks in the differential assembly.

• Inside diameter: 1.720 inches (43.690 mm)
• Outside diameter: 2.922 inches (74.220 mm)
• Thickness: 0.468 inches (11.890 mm)
• Overall width with side lip: 0.728 inches (18.500 mm)
• Material: durable polyacrylate
• Bi-directional lip design for enhanced sealing
• Housing bore diameter: 2.921 inches (74.190 mm)
• Series: 710400

Technical Details and Specifications

This National differential pinion seal (part number 710476) features a bi-directional lip design that ensures effective sealing against oil leaks in both rotational directions. Constructed from polyacrylate material, it offers resistance to heat and wear, suitable for the demanding environment of the differential pinion shaft. The seal’s precise dimensions, including a 1.720-inch inside diameter and 2.922-inch outside diameter, make it compatible with specific driveline housings and shafts.

Compatible Vehicles and Applications

This differential pinion seal is compatible with various models including Chrysler Aspen, Dodge Dakota, Dodge Durango, Mitsubishi Raider, and Ram 1500 trucks. It is designed to fit the differential pinion shaft and housing bore dimensions typical of these vehicles, ensuring a proper fit and reliable sealing performance.

Common Issues Addressed by the National 710476 Seal

• Prevents oil leaks from the differential pinion shaft
• Reduces contamination ingress into the differential assembly
• Maintains proper lubrication for differential gears
• Minimizes wear on the pinion shaft and bearings
• Helps avoid costly drivetrain repairs due to seal failure

Installation Notes and Tips

When installing the National 710476 differential pinion seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the bi-directional lip design for optimal performance. Lubricate the seal lip lightly with gear oil before installation to reduce initial wear.

Quality Assurance and Warranty

National manufactures the 710476 differential pinion seal to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to a long service life under normal operating conditions. Warranty coverage details should be confirmed with the product documentation or supplier.