National 710735 Differential Pinion Seal - Rear Outer

Overview of National 710735 Differential Pinion Seal

The National 710735 differential pinion seal is engineered for reliable sealing performance in driveline applications. Designed specifically for Lexus and Toyota models such as the Land Cruiser, LX470, LX570, and Tundra, this seal helps maintain optimal differential function by preventing oil leaks.

• Inside diameter: 1.772 inches (45.000 mm)
• Outside diameter: 2.921 inches (74.200 mm)
• Thickness: 0.433 inches (11.000 mm)
• Overall width with side lip: 0.709 inches (18.000 mm)
• Material: Polyacrylate for durability and resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore diameter: 2.913 inches (74.000 mm)
• Part type: Differential pinion seal, part number 710735

Technical Details and Specifications

The National 710735 differential pinion seal features a polyacrylate construction that offers resistance to heat and wear, ensuring long service life in demanding driveline environments. Its clockwise-spiral lip design enhances sealing efficiency by directing lubricant back into the differential housing, reducing the risk of leaks. The seal’s precise dimensions, including a 1.772-inch inside diameter and 2.921-inch outside diameter, make it compatible with specific Lexus and Toyota differentials. The overall width of 0.709 inches with side lip ensures a secure fit within the housing bore of 2.913 inches.

Compatible Vehicles and Applications

This differential pinion seal is compatible with the following vehicles:

• Lexus Land Cruiser
• Lexus LX470
• Lexus LX570
• Toyota Tundra

It is designed to maintain the integrity of the differential assembly by preventing oil leakage and contamination, which is critical for the proper operation of these models’ driveline systems.

Common Issues Addressed by the National 710735 Seal

• Prevents differential oil leaks that can cause driveline damage
• Reduces contamination ingress into the differential housing
• Maintains proper lubrication of the pinion shaft
• Minimizes wear on differential components due to oil loss
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

• Ensure the housing bore is clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal orientation matches the clockwise-spiral lip design
• Check shaft and bore dimensions to confirm compatibility
• Apply a light coat of lubricant on the seal lip before fitting

Quality Assurance and Warranty

National manufactures the 710735 differential pinion seal to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to consistent sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product.