National 710688 Axle Output Shaft Seal - Front Right

Overview of National 710688 Axle Output Shaft Seal

The National 710688 axle output shaft seal is engineered to provide reliable sealing performance for driveline components. Designed with nitrile material and a bi-directional lip design, this oil seal is compatible with select Buick, Chevrolet, GMC, Isuzu, and Saab models, including Trailblazer, Envoy, and Ascender.

• Constructed from durable nitrile material for resistance to oil and wear
• Bi-directional helix lip design enhances sealing efficiency
• Inside diameter of 1.476 inches (31.750 mm) fits specific axle shafts
• Outside diameter measures 2.961 inches (75.200 mm) for precise housing bore fit
• Thickness of 0.571 inches (14.500 mm) ensures proper sealing depth
• Overall width with side lip is 0.787 inches (20.000 mm) for added protection

Detailed Product Description and Specifications

The National 710688 axle output shaft seal is part of the 710600 series, designed to maintain effective sealing in driveline and axle assemblies. Its nitrile composition offers excellent resistance to petroleum-based fluids and mechanical wear, making it suitable for demanding automotive environments. The seal features a bi-directional helix lip design that helps prevent oil leakage in both rotational directions, enhancing durability and performance.

With an inside diameter of 1.476 inches (31.750 mm) and an outside diameter of 2.961 inches (75.200 mm), this seal fits axle shafts and housing bores with corresponding dimensions, such as the 2.953-inch (75.000 mm) housing bore. The thickness of 0.571 inches (14.500 mm) and overall width including the side lip of 0.787 inches (20.000 mm) ensure a secure and tight fit, reducing the risk of contamination and fluid loss.

Compatible Vehicles and Applications

This axle output shaft seal is compatible with a range of vehicles, including:

• Buick Rainier
• Chevrolet Trailblazer, Trailblazer EXT
• GMC Envoy, Envoy XL, Envoy XUV
• Isuzu Ascender
• Saab 9-7x

It is specifically designed to replace worn or damaged seals in these models, ensuring proper driveline function and preventing oil leaks.

Common Issues Addressed by the National 710688 Seal

• Prevents axle oil leaks that can cause driveline damage
• Reduces contamination ingress into axle assemblies
• Minimizes premature wear of axle output shafts
• Maintains proper lubrication within the axle housing
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

• Ensure the axle 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 bi-directional lip design for optimal performance
• Check for proper fit by confirming inside and outside diameters correspond to vehicle specifications
• Apply a light coating of compatible lubricant on the seal lip before installation

Quality Assurance and Warranty Information

National axle output shaft seals are manufactured to meet industry standards for durability and performance. The 710688 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.