National 710539 Automatic Transmission Torque Converter Seal

Overview of National 710539 Automatic Transmission Torque Converter Seal

The National 710539 automatic transmission torque converter seal is engineered for reliable sealing performance in select Ford, Mazda, and Mercury vehicles. Designed with precision dimensions and durable fluoro-elastomer material, this seal helps maintain transmission fluid integrity and prevents leaks in torque converter assemblies.

• Inside diameter: 1.575 inches (40.000 mm)
• Outside diameter: 2.367 inches (60.120 mm)
• Thickness: 0.217 inches (5.500 mm)
• Helix type: Clockwise-spiral lip design for effective sealing
• Material: Fluoro-elastomer for high resistance to heat and chemicals
• Housing bore compatibility: 2.362 inches (60.000 mm)
• Part number: 710539, Series 710500

Technical Details and Material Specifications

This automatic transmission torque converter seal features a fluoro-elastomer construction, providing excellent resistance to transmission fluids, heat, and wear. The seal’s clockwise-spiral lip design enhances sealing efficiency by maintaining consistent contact with the shaft and housing bore. With an inside diameter of 1.575 inches and an outside diameter of 2.367 inches, it fits precisely within the housing bore of 2.362 inches, ensuring a secure fit and preventing fluid leakage. The thickness of 0.217 inches contributes to durability and proper sealing pressure.

Compatible Vehicles and Applications

This National 710539 seal is compatible with various Ford, Mazda, and Mercury models, including Ford Focus, Fusion, and Transit Connect; Mazda 3, 3 Sport, 5, and 6; and Mercury Milan, Protege, and Protege5. It is specifically designed for automatic transmission torque converter sealing applications, helping maintain transmission performance and fluid containment.

• Prevents transmission fluid leaks in torque converter assemblies
• Reduces risk of contamination entering the transmission system
• Maintains proper hydraulic pressure within the transmission
• Helps avoid premature transmission wear and damage
• Supports smooth torque converter operation and vehicle drivability

Installation Notes and Tips

When installing the National 710539 torque converter seal, ensure the sealing surfaces are clean and free of debris. Lubricate the seal lip with transmission fluid before installation to prevent damage. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the seal’s orientation matches the clockwise-spiral lip design for optimal sealing performance. Proper installation helps avoid leaks and extends the service life of the transmission.

Quality Assurance and Warranty Information

National transmission seals are manufactured to meet industry standards for durability and performance. The 710539 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, providing confidence in the product’s reliability for Ford, Mazda, and Mercury automatic transmission applications.