National 710558 Differential Pinion Seal - Front Outer

National 710558 Differential Pinion Seal Overview

The National 710558 differential pinion seal is engineered for reliable sealing performance in Dodge Ram 1500, 2500, and 3500 models. Designed with precision dimensions and a bi-directional lip design, this oil seal helps maintain differential integrity by preventing fluid leaks.

• Inside diameter: 2.125 inches (53.975 mm)
• Outside diameter: 2.920 inches (74.166 mm)
• Flanged outside diameter: 3.346 inches (85.000 mm)
• Thickness: 0.469 inches (11.913 mm)
• Material: PTFE for enhanced durability and chemical resistance
• Bi-directional helix lip design for effective sealing under varying rotational directions
• Compatible housing bore: 2.914 inches (74.016 mm)

Technical Details and Design Features

This National differential pinion seal (part number 710558) is constructed from PTFE, a material known for its resistance to wear, heat, and automotive fluids. The seal features a bi-directional helix lip design that provides a secure seal around the pinion shaft, which measures 2.125 inches in diameter. The flanged outside diameter of 3.346 inches ensures a proper fit within the housing bore of 2.914 inches, minimizing the risk of leaks. With an overall width of 0.547 inches including the side lip, this seal is designed to maintain optimal sealing pressure and durability in demanding driveline applications.

Compatible Vehicles and Applications

This differential pinion seal is compatible with various Dodge Ram models, including Ram 1500, Ram 2500, and Ram 3500 trucks. It is specifically designed to fit the driveline and axle assemblies of these vehicles, ensuring proper sealing and protection of the differential pinion shaft.

• Prevents oil leaks from the differential pinion shaft
• Protects against contamination and debris ingress
• Maintains differential fluid integrity for smooth driveline operation
• Reduces wear on pinion shaft and bearings
• Helps avoid costly differential repairs due to seal failure

Installation Notes and Tips

When installing the National 710558 differential pinion seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the PTFE lip. Verify the seal orientation matches the bi-directional lip design for optimal sealing performance. Lubricate the seal lip lightly with differential fluid before installation to reduce initial wear. Proper installation will help maintain the seal’s effectiveness and extend service life.

Quality Assurance and Warranty

National manufactures the 710558 differential pinion seal to meet industry standards for durability and performance. The use of PTFE material and precise engineering ensures consistent sealing under typical operating conditions. While specific warranty details may vary, National products generally come with a limited warranty against manufacturing defects, providing confidence in the product’s reliability for Dodge Ram 1500, 2500, and 3500 applications.