National 710699 Automatic Transmission Torque Converter Seal

Overview of National 710699 Automatic Transmission Torque Converter Seal

The National 710699 automatic transmission torque converter seal is engineered to provide reliable sealing performance for a range of vehicles including Buick, Cadillac, Chevrolet, Ford, Hyundai, Land Rover, Lincoln, Mazda, Mercury, Saab, and Volvo models. Designed with precision dimensions and durable ethylene-acrylic material, this seal helps maintain transmission fluid integrity and prevents leaks in critical torque converter assemblies.

• Inside diameter: 1.850 inches (47.000 mm)
• Outside diameter: 2.488 inches (63.200 mm)
• Thickness: 0.197 inches (5.000 mm)
• Width: 0.236 inches (6.000 mm)
• Helix type: Clockwise-spiral lip design for enhanced sealing
• Material: Ethylene-acrylic for durability and resistance to transmission fluids
• Housing bore compatibility: 2.480 inches (63.000 mm)
• Part number: 710699, part of the 710600 series

Technical Details and Design Features

The National 710699 seal features a clockwise-spiral lip design that improves sealing efficiency by directing fluid away from the shaft, reducing leakage and wear. Its ethylene-acrylic construction offers resistance to heat, oxidation, and transmission fluid chemicals, ensuring long service life. The precise inside diameter of 1.850 inches (47 mm) and outside diameter of 2.488 inches (63.2 mm) make it compatible with specific torque converter shafts and housings, including those found in models like the Chevrolet Cruze, Ford Fusion, Volvo XC60, and Saab 9-3.

Compatible Vehicles and Applications

This automatic transmission torque converter seal is compatible with a variety of makes and models, including Buick Regal, Cadillac SRX, Chevrolet Verano, Ford Five Hundred, Hyundai Veracruz, Land Rover Range Rover Evoque, Lincoln MKZ, Mazda CX-7, Mercury Milan, Saab 9-5, and Volvo S60, V70, and XC90. The part number 710699 is designed to meet the specifications required for these vehicles’ transmission systems, ensuring proper fit and function.

Common Issues Addressed by the National 710699 Seal

• Prevents transmission fluid leaks around the torque converter shaft
• Reduces contamination and fluid loss that can cause transmission slippage
• Minimizes wear on transmission components by maintaining proper lubrication
• Helps avoid costly transmission repairs due to seal failure
• Maintains optimal transmission pressure for smooth shifting

Installation Notes and Tips

When installing the National 710699 torque converter seal, ensure the housing bore and shaft dimensions match the seal specifications (2.480 inches housing bore and 1.850 inches shaft diameter). Clean the sealing surfaces thoroughly before installation to prevent damage or leaks. Use appropriate tools to avoid deforming the seal during installation, and verify the clockwise-spiral lip orientation aligns with the rotation direction of the torque converter shaft.

Quality Assurance and Warranty

Manufactured by National, a trusted brand in transmission gaskets and sealing systems, the 710699 seal adheres to strict quality standards for durability and performance. The ethylene-acrylic material and precision engineering contribute to reliable sealing under demanding operating conditions. Warranty coverage details should be confirmed with the vehicle manufacturer or parts distributor.