National 710689 Manual Transmission Output Shaft Seal

Overview of National 710689 Manual Transmission Output Shaft Seal

The National 710689 manual transmission output shaft seal is engineered to provide reliable sealing performance for a range of vehicles including Toyota, Lexus, Hummer, Pontiac, and Saturn models. Designed with precision dimensions and durable polyacrylate material, this seal helps maintain transmission integrity by preventing oil leaks and contamination.

• Inside diameter: 1.575 inches (40.000 mm)
• Outside diameter: 2.291 inches (58.200 mm)
• Thickness: 0.433 inches (11.000 mm)
• Sealing material: Polyacrylate for enhanced durability
• Counter-clockwise spiral lip design for effective sealing
• Compatible housing bore: 2.283 inches (58.000 mm)
• Part number: 710689, Series 710600

Technical Details and Material Specifications

This manual transmission output shaft seal from National is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear. The seal features a counter-clockwise spiral lip design that improves sealing efficiency by directing fluid back into the transmission housing. With an inside diameter of 1.575 inches and an outside diameter of 2.291 inches, it fits shafts measuring 40 mm and housing bores around 58 mm, making it suitable for various manual transmission applications.

Compatible Vehicles and Applications

The National 710689 output shaft seal is compatible with multiple vehicle makes and models, including Toyota 4Runner, Tacoma, Tundra, Land Cruiser, and FJ Cruiser; Lexus GS300, GS350, IS250, IS350, LS400, LX450, LX470, RC350, SC300, SC400; Hummer H3 and H3T; Pontiac Solstice and G6; and Saturn Sky. This part is designed specifically for manual transmission output shafts, ensuring proper fit and function.

Common Issues Addressed by This Output Shaft Seal

• Prevents oil leaks from the manual transmission output shaft
• Reduces contamination ingress that can damage transmission components
• Maintains proper lubrication within the transmission system
• Minimizes wear on the output shaft and surrounding components
• Helps avoid costly transmission repairs due to seal failure

Installation Notes and Tips

When installing the National 710689 output shaft seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to avoid damaging the seal during installation. Verify the seal’s orientation matches the counter-clockwise spiral lip design for optimal sealing performance. It is recommended to inspect the shaft for wear or damage before installation and replace if necessary.

Quality Assurance and Warranty Information

National manufactures the 710689 output shaft seal to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to a reliable seal life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.