National 710769 Transfer Case Output Shaft Seal - Rear

Overview of National Transfer Case Output Shaft Seal 710769

The National 710769 transfer case output shaft seal is engineered for reliable sealing performance in select Chevrolet, GMC, and Isuzu vehicles. Designed to maintain optimal transfer case function, this oil seal helps prevent fluid leaks and contamination in models like the Chevrolet Colorado and GMC Canyon.

• Inside diameter options: 1.260 inch (32 mm) and 1.496 inch (38 mm) shaft sizes
• Outside diameter: 1.937 inch (49.2 mm)
• Seal thickness: 0.709 inch (18 mm)
• Constructed from durable PTFE sealing material
• Counter-clockwise spiral lip design for enhanced sealing
• Compatible with housing bore diameter of approximately 1.929 inch (49 mm)

Technical Details and Material Specifications

This transfer case output shaft seal from National is part of the 710700 series and features a PTFE (polytetrafluoroethylene) sealing material known for its chemical resistance and low friction properties. The seal’s counter-clockwise spiral lip design improves sealing efficiency by directing fluid back into the transfer case, reducing leakage. With an outside diameter of 1.937 inches and a thickness of 0.709 inches, it fits precisely into the housing bore of 1.929 inches, ensuring a secure fit on shafts measuring 1.496 inches in diameter.

Compatible Vehicles and Applications

This National transfer case output shaft seal 710769 is compatible with the following vehicles:

• Chevrolet Colorado
• GMC Canyon
• Isuzu i-350
• Isuzu i-370

It is specifically designed to maintain transfer case integrity in these models by preventing oil leaks and contamination around the output shaft.

Common Issues Addressed by This Seal

• Prevents transfer case fluid leaks that can cause damage
• Reduces contamination from dirt and debris entering the transfer case
• Minimizes wear on the output shaft and surrounding components
• Maintains proper lubrication for transfer case longevity
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to avoid damaging the PTFE seal lip during installation
• Verify correct orientation of the counter-clockwise spiral lip for optimal sealing
• Check shaft and bore dimensions to confirm compatibility with the 710769 seal
• Apply a light coating of transfer case fluid on the seal lip to ease installation

Quality Assurance and Warranty

National transfer case output shaft seals are manufactured to meet industry standards for durability and performance. The 710769 seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.