National 710259 Manual Transmission Output Shaft Seal - Left

Overview of National 710259 Manual Transmission Output Shaft Seal

The National 710259 manual transmission output shaft seal is engineered to provide reliable sealing performance for select Dodge, Hyundai, Mitsubishi, and Plymouth vehicles. Designed with a bi-directional lip and constructed from durable fluoro-elastomer, this oil seal helps maintain transmission integrity by preventing fluid leaks.

• Inside diameter: 1.457 inches (37.000 mm)
• Outside diameter: 2.213 inches (56.200 mm)
• Thickness/width: 0.492 inches (12.500 mm)
• Bi-directional lip design for effective sealing
• Material: Fluoro-elastomer for enhanced chemical and temperature resistance
• Housing bore compatibility: 2.205 inches (56.000 mm)

Detailed Product Description

The National 710259 output shaft seal is part of the 710200 series, designed specifically for manual transmissions requiring precise sealing solutions. Its fluoro-elastomer construction offers resistance to heat, oil, and other transmission fluids, ensuring durability under demanding operating conditions. The bi-directional lip design provides a secure seal around the output shaft, minimizing the risk of leaks that can lead to transmission damage.

With an inside diameter of 1.457 inches (37 mm) and an outside diameter of 2.213 inches (56.2 mm), this seal fits housing bores measuring approximately 2.205 inches (56 mm). The thickness of 0.492 inches (12.5 mm) ensures a snug fit, maintaining proper sealing pressure without compromising shaft rotation.

Compatible Vehicles and Applications

This manual transmission output shaft seal is compatible with a range of vehicles, including:

• Dodge 3000GT
• Hyundai Elantra, Sonata, Tiburon
• Mitsubishi Eclipse, Galant, Laser, Stealth
• Plymouth Colt, Diamante, Expo, Expo LRV

It is designed to replace worn or damaged seals in these models, helping to maintain transmission fluid containment and prevent contamination.

Common Issues Addressed by National 710259 Seal

• Prevents transmission fluid leaks from the output shaft area
• Reduces risk of contamination entering the transmission
• Helps maintain proper lubrication and pressure within the transmission
• Minimizes wear on transmission components caused by fluid loss
• Improves overall transmission reliability and lifespan

Installation Notes and Tips

When installing the National 710259 output shaft seal, ensure the transmission output shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the bi-directional lip design for optimal performance. Avoid using excessive force during installation to prevent seal deformation.

Quality Assurance and Warranty

National manufactures the 710259 output shaft seal to meet industry standards for durability and performance. The fluoro-elastomer material is selected for its resistance to heat and chemical exposure typical in manual transmissions. While specific warranty details are not provided, National products generally adhere to quality control processes to ensure reliable service life.