National 710217 Differential Pinion Seal - Rear Outer

National Differential Pinion Seal for Mazda 323, Miata, and Protege

The National 710217 differential pinion seal is engineered to provide reliable sealing performance for select Mazda vehicles. Designed specifically for the Mazda 323, Miata, and Protege models, this oil seal helps maintain proper lubrication and prevents leaks in the driveline system.

• Inside diameter: 1.378 inches (35.000 mm)
• Outside diameter: 2.130 inches (54.100 mm)
• Flanged outside diameter: 2.677 inches (68.000 mm)
• Thickness: 0.354 inches (9.000 mm)
• Material: Durable nitrile sealing compound
• Compatible with housing bore diameter of 2.126 inches (54.000 mm)
• Part number: 710217

Technical Details and Material Specifications

This differential pinion seal from National is constructed using nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. The seal’s precise dimensions, including a 1.378-inch inside diameter and a 2.130-inch outside diameter, ensure a secure fit around the pinion shaft and housing bore. The flanged outside diameter of 2.677 inches provides additional stability during installation. With an overall width of 0.354 inches, this seal maintains a compact profile while delivering effective sealing performance in the driveline and axle assembly.

Applications and Problem Solving

This National differential pinion seal is compatible with the following Mazda vehicles:

• Mazda 323
• Mazda Miata
• Mazda Protege

It is designed to address common issues such as:

• Preventing oil leaks from the differential pinion shaft
• Reducing contamination ingress into the differential housing
• Maintaining proper lubrication for driveline components
• Minimizing wear on the pinion shaft and bearings

Installation Notes and Tips

When installing the National 710217 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 original part to maintain proper sealing function. Lubricate the sealing lip lightly with gear oil before installation to reduce initial wear.

Quality Assurance and Warranty

National manufactures this differential pinion seal to meet industry standards for durability and performance. The nitrile material offers resistance to oil and heat, contributing to a longer service life. While specific warranty details may vary, National parts typically come with a limited warranty against manufacturing defects, ensuring confidence in the product’s quality and reliability.