National 710590 Automatic Transmission Output Shaft Seal - Left

Overview of National 710590 Automatic Transmission Output Shaft Seal

The National 710590 automatic transmission output shaft seal is engineered to provide reliable sealing performance for various Ford, Lincoln, Mazda, Mercury, and Volvo models. Designed with precision dimensions and durable materials, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.693 inches (43.000 mm)
• Outside diameter: 2.488 inches (63.200 mm)
• Thickness/width: 0.339 inches (8.600 mm)
• Bi-directional lip design for effective sealing
• Constructed from fluoro-elastomer for enhanced chemical and temperature resistance
• Compatible housing bore: 2.480 inches (63.000 mm)
• Part number: 710590, Series 710500

Detailed Product Description

This National automatic transmission output shaft seal (part number 710590) is manufactured using fluoro-elastomer, a material known for its resistance to heat, oil, and wear. The seal features a bi-directional lip design that ensures effective sealing against transmission fluid leaks in both rotational directions. With an inside diameter of 1.693 inches and an outside diameter of 2.488 inches, it fits precisely into the housing bore of 2.480 inches, providing a secure and durable fit. The 0.339-inch thickness adds to the seal's robustness, making it suitable for demanding transmission applications.

Compatible Vehicles and Applications

This output shaft seal is compatible with a range of vehicles, including Ford Fusion, Lincoln MKZ, Mazda CX-7 and CX-9, Mercury Milan, and several Volvo models such as S60, S80, V60, V60 Cross Country, V70, XC60, XC70, and XC90. It is designed specifically for automatic transmissions requiring a 32-type seal with the specified dimensions.

Common Issues Addressed by the National 710590 Seal

• Prevents automatic transmission fluid leaks from the output shaft area
• Reduces risk of transmission contamination and damage
• Maintains proper fluid pressure within the transmission system
• Minimizes premature wear of transmission components due to fluid loss
• Helps avoid costly transmission 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 seal lips during installation
• Verify the seal orientation matches the bi-directional lip design for optimal sealing
• Check for proper fitment with the specified inside and outside diameters
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National transmission seals are manufactured to meet industry standards for durability and performance. The 710590 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.