National 710918 Transfer Case Output Shaft Seal - Front

Overview of National Transfer Case Output Shaft Seal 710918

The National 710918 transfer case output shaft seal is engineered for reliable sealing performance in select Nissan and INFINITI vehicles. Designed to maintain optimal fluid retention, this oil seal helps protect your transfer case from leaks and contamination.

• Compatible with Nissan Murano, X-Trail, and INFINITI JX35 models
• Constructed from durable polyacrylate sealing material
• Inside diameter: 1.496 inches (38.0 mm)
• Outside diameter: 1.976 inches (50.2 mm)
• Thickness/width: 0.866 inches (22.0 mm) / 0.854 inches (21.7 mm)
• Housing bore size: 1.969 inches (50.0 mm)
• Part number 710918 from National's 710900 series

Technical Specifications and Material Details

This transfer case output shaft seal features a polyacrylate sealing material known for its resistance to heat and wear, ensuring a tight seal around the shaft. The seal’s inside diameter measures 1.496 inches (38 mm), fitting shafts approximately 1.535 inches (39 mm) in diameter. The outside diameter of 1.976 inches (50.2 mm) matches the housing bore size of 1.969 inches (50 mm), providing a precise fit to prevent fluid leakage. With a thickness of approximately 0.866 inches (22 mm), this seal is designed to withstand the operational pressures within the transfer case assembly.

Application and Vehicle Compatibility

This National transfer case output shaft seal is specifically compatible with the following vehicles:

• Nissan Murano
• Nissan X-Trail
• INFINITI JX35

Using the correct seal, such as part number 710918, ensures proper fitment and function within the transfer case, helping maintain drivetrain integrity and performance.

Common Issues Addressed by the Transfer Case Output Shaft Seal

• Prevents transfer case fluid leaks that can lead to low fluid levels
• Protects internal components from dirt and debris contamination
• Reduces risk of premature transfer case wear due to fluid loss
• Maintains proper lubrication for output shaft bearings and gears
• Helps avoid costly transfer case repairs caused by seal failure

Installation Notes and Tips

When installing the National 710918 transfer case output shaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the sealing lip. Verify the seal orientation matches manufacturer specifications to maintain effective sealing. It is recommended to inspect the shaft for wear or damage before installation and replace if necessary to prevent premature seal failure.

Quality Assurance and Warranty Information

National transfer case output shaft seals are manufactured to meet OEM standards for fit, form, and function. The polyacrylate material provides durability under typical operating conditions. Part number 710918 is part of National’s 710900 series, known for consistent quality in gaskets and sealing systems. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.