National 710525 Differential Pinion Seal - Rear Outer

Overview of National 710525 Differential Pinion Seal

The National 710525 differential pinion seal is engineered to provide reliable sealing performance for various Lexus and Toyota models. Designed with precision, this oil seal helps maintain differential integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.732 inches (44.000 mm)
• Outside diameter: 2.921 inches (74.200 mm)
• Thickness: 0.433 inches (11.000 mm)
• Material: Durable nitrile rubber for resistance to oil and wear
• Helix type: Clockwise-spiral lip design for effective sealing
• Overall width with side lip: 0.709 inches (18.000 mm)
• Compatible with shaft diameter of 1.732 inches (44.000 mm)

Technical Details and Specifications

This National differential pinion seal (part number 710525) features a nitrile construction that offers excellent resistance to heat, oil, and abrasion, making it suitable for demanding driveline applications. The clockwise-spiral lip design enhances sealing efficiency by directing fluid back into the differential housing, reducing the risk of leaks. With an outside diameter of 2.921 inches and a thickness of 0.433 inches, this seal fits precisely into the housing bore of 2.913 inches (74.000 mm), ensuring a secure and tight fit.

Compatible Vehicles and Applications

The National 710525 differential pinion seal is compatible with a range of Lexus and Toyota vehicles, including the Lexus GS300, GS400, GS430, GX470, LS400, LS430, SC300, SC400, SC430, and Toyota Sequoia, Supra, T100, Tacoma, and Tundra models. This part is designed specifically for driveline and axle sealing systems, making it a suitable replacement for maintaining differential performance in these vehicles.

Common Issues Addressed by the 710525 Differential Pinion Seal

• Prevents oil leaks from the differential pinion shaft
• Protects differential components from dirt and debris contamination
• Reduces wear on the pinion shaft by maintaining proper lubrication
• Helps maintain optimal differential performance and longevity
• Minimizes the risk of costly driveline repairs due to seal failure

Installation Notes and Tips

When installing the National 710525 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 clockwise-spiral lip design for proper fluid retention. It is recommended to inspect the pinion shaft for wear or damage before installation to ensure optimal sealing performance.

Quality Assurance and Warranty

National manufactures the 710525 differential pinion seal to meet industry standards for durability and performance. Constructed from high-quality nitrile material, this seal is designed to withstand the rigors of automotive driveline environments. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, providing confidence in the part’s reliability.