National 710665 Transfer Case Output Shaft Seal - Front

National Transfer Case Output Shaft Seal Overview

The National 710665 transfer case output shaft seal is engineered to provide reliable sealing performance for select INFINITI, Nissan, and Suzuki vehicles. Designed with precision dimensions and durable polyacrylate material, this oil seal helps maintain transfer case integrity and prevent fluid leaks.

• Inside diameter: 1.772 inches (45.000 mm)
• Outside diameter: 2.761 inches (70.130 mm)
• Thickness: 0.551 inches (14.000 mm)
• Sealing material: Polyacrylate for enhanced durability
• Clockwise-spiral lip design for effective sealing
• Fits housing bore of 2.756 inches (70.000 mm)
• Overall width with side lip: 0.945 inches (24.000 mm)

Detailed Product Description

The National 710665 transfer case output shaft seal is constructed from polyacrylate, a material known for its resistance to heat, wear, and chemical exposure. Its clockwise-spiral lip design ensures a tight seal around the output shaft, minimizing the risk of oil leakage from the transfer case. With precise inside and outside diameters matching OEM specifications, this seal fits securely within the housing bore, maintaining proper lubrication and protecting internal components.

This seal is part of National's 710600 series, which focuses on transfer case gaskets and sealing systems designed for durability and reliable performance in demanding automotive applications.

Compatible Vehicles and Applications

This transfer case output shaft seal is compatible with a range of vehicles including INFINITI models like the QX4 and QX56, Nissan models such as Armada, Frontier, Pathfinder, Pathfinder Armada, TITAN, and Xterra, as well as Suzuki vehicles. The part number 710665 ensures correct fitment for these specific models, supporting proper transfer case function and longevity.

Common Issues Addressed by This Seal

• Prevents transfer case fluid leaks that can lead to component damage
• Reduces contamination ingress into the transfer case
• Maintains proper lubrication of the output shaft
• Helps avoid costly repairs due to seal failure
• Supports smooth drivetrain operation in 4WD and AWD systems

Installation Notes and Tips

• Ensure the transfer case output shaft and housing bore are 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 for optimal sealing
• Check for proper seating to prevent leaks and premature wear

Quality Assurance and Warranty

National transfer case output shaft seals are manufactured to meet or exceed OEM standards, providing reliable sealing performance. The 710665 seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. Warranty coverage details should be confirmed with the product documentation or supplier.