National 710523 Differential Pinion Seal - Front Outer or Rear Outer

Overview of National 710523 Differential Pinion Seal

The National 710523 differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed with precision dimensions and durable nitrile material, this oil seal is compatible with various Chevrolet, Geo, GMC, Pontiac, and Suzuki models including the Grand Vitara, Sidekick, Sunrunner, Tracker, Vitara, X-90, and XL-7.

• Inside diameter: 1.575 inches (40.000 mm)
• Outside diameter: 2.843 inches (72.200 mm)
• Thickness: 0.433 inches (11.000 mm)
• Housing bore diameter: 2.835 inches (72.000 mm)
• Overall width with side lip: 0.728 inches (18.500 mm)
• Material: Nitrile rubber for oil resistance and durability
• Part number: 710523, Series 710500

Technical Details and Specifications

This differential pinion seal from National is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. The seal’s precise inside diameter of 1.575 inches (40 mm) ensures a secure fit around the pinion shaft, while the outside diameter of 2.843 inches (72.2 mm) matches the housing bore for effective sealing. The thickness of 0.433 inches (11 mm) and overall width with side lip of 0.728 inches (18.5 mm) provide a robust barrier against fluid leaks and contaminants. This part is designed specifically for driveline and axle sealing systems, maintaining differential fluid integrity in vehicles such as the Chevrolet Tracker and Suzuki Grand Vitara.

Compatible Vehicles and Applications

The National 710523 differential pinion seal is compatible with a range of vehicles, including:

• Chevrolet Tracker
• Geo Sidekick and Sunrunner
• GMC models with similar driveline specifications
• Pontiac models requiring a 40 series pinion seal
• Suzuki Grand Vitara, Vitara, X-90, and XL-7

This seal is ideal for replacing worn or damaged pinion seals in these models to maintain proper differential function and prevent leaks.

Common Issues Addressed by the 710523 Pinion Seal

• Prevents differential fluid leaks that can cause driveline damage
• Stops contamination from dirt and debris entering the differential housing
• Reduces wear on the pinion shaft by maintaining proper lubrication
• Eliminates noise and vibration caused by fluid loss or seal failure
• Helps maintain optimal differential performance and longevity

Installation Notes and Tips

• Ensure the housing bore and pinion shaft are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Apply a light coating of differential fluid on the seal lip to ease installation and prevent dry running
• Verify the seal is fully seated and flush with the housing surface
• Check for leaks after installation by monitoring differential fluid levels during initial operation

Quality Assurance and Warranty

National manufactures the 710523 differential pinion seal to meet industry standards for durability and performance. Made from high-quality nitrile material, this seal offers resistance to oil degradation and temperature variations commonly encountered in automotive driveline systems. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring confidence in the part’s reliability for Chevrolet, Geo, GMC, Pontiac, and Suzuki applications.