National 710078 Automatic Transmission Torque Converter Seal

Overview of National 710078 Automatic Transmission Torque Converter Seal

The National 710078 automatic transmission torque converter seal is engineered to provide reliable sealing performance for select Chevrolet, Geo, Isuzu, and Pontiac vehicles. Designed with precision dimensions and durable fluoro-elastomer material, this oil seal helps maintain transmission fluid integrity and prevents leaks.

• Inside diameter: 1.772 inches (45.000 mm)
• Outside diameter: 2.447 inches (62.150 mm)
• Thickness/width: 0.315 inches (8.000 mm)
• Material: Fluoro-elastomer for enhanced chemical and temperature resistance
• Compatible with Chevrolet I-Mark, Geo Spectrum, Isuzu Stylus, Pontiac Sunburst, and Pontiac Storm models

Detailed Product Description and Specifications

This National 710078 torque converter seal is part of the 710000 series and is specifically designed to fit the housing bore diameter of approximately 2.441 inches (62.000 mm). The seal’s fluoro-elastomer construction offers excellent resistance to transmission fluids, heat, and wear, ensuring a tight seal around the torque converter shaft. With an inside diameter of 1.772 inches (45.000 mm) and an outside diameter of 2.447 inches (62.150 mm), this seal matches the precise dimensions required for proper fitment in the automatic transmissions of Chevrolet I-Mark, Geo Spectrum, Isuzu Stylus, Pontiac Sunburst, and Pontiac Storm vehicles. The 0.315 inch (8.000 mm) thickness provides durability and maintains sealing integrity under operating conditions.

Common Applications and Problem Solving

• Prevents automatic transmission fluid leaks around the torque converter
• Maintains proper hydraulic pressure within the transmission system
• Reduces risk of contamination entering the transmission housing
• Helps avoid premature transmission wear caused by fluid loss
• Addresses issues related to worn or damaged torque converter seals in Chevrolet, Geo, Isuzu, and Pontiac models

Installation Notes and Tips

• Ensure the transmission housing bore is clean and free of debris before installation
• Verify the shaft diameter matches the 1.772 inch (45.000 mm) specification for proper sealing
• Use appropriate tools to avoid damaging the fluoro-elastomer seal during installation
• Lubricate the seal lightly with transmission fluid to ease installation and prevent damage
• Check for proper seating and alignment to avoid leaks and premature failure

Quality Assurance and Warranty Information

National’s 710078 torque converter seal is manufactured to meet industry standards for durability and performance. The fluoro-elastomer material ensures resistance to heat and chemical degradation commonly encountered in automatic transmissions. This part is backed by National’s quality control processes, providing confidence in fitment and function for Chevrolet I-Mark, Geo Spectrum, Isuzu Stylus, Pontiac Sunburst, and Pontiac Storm vehicles. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.