National 340797 Manual Transmission Shift Shaft Seal

Overview of National 340797 Manual Transmission Shift Shaft Seal

The National 340797 manual transmission shift shaft seal is engineered to provide reliable sealing performance for a range of classic and modern vehicles. Designed with durable nitrile material, this oil seal ensures effective protection against leaks and contamination in manual transmission systems.

• Inside diameter options: 0.593 inch (15.060 mm)
• Outside diameter: 0.943 inch (23.950 mm)
• Thickness: 0.175 inch (4.450 mm)
• Constructed from high-quality nitrile sealing material
• Compatible with multiple makes and models including Ford Mustang, Jeep Cherokee, and Dodge Dart

Technical Specifications and Material Details

The National 340797 shift shaft seal features a precise inside diameter of 0.593 inches (15.060 mm) and an outside diameter of 0.943 inches (23.950 mm), making it suitable for shafts and housing bores measuring approximately 0.935 inches (23.750 mm). The seal thickness of 0.175 inches (4.450 mm) provides a secure fit within the transmission assembly. Manufactured from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear, this seal maintains integrity under demanding operating conditions.

Compatible Vehicles and Applications

This manual transmission shift shaft seal is compatible with a variety of vehicles, including Buick Skylark, Dodge Dart, Ford F-100, Jeep CJ7, Mercury Cougar, Oldsmobile Cutlass, and others. It is designed to replace worn or damaged seals in manual transmissions of these models, helping to maintain proper lubrication and prevent fluid leaks.

• Prevents oil leaks from the manual transmission shift shaft
• Protects transmission internals from dirt and contaminants
• Reduces wear on transmission components by maintaining lubrication
• Helps maintain smooth shifting performance
• Addresses common seal failure issues in older vehicles

Installation Notes and Tips

When installing the National 340797 shift shaft seal, ensure the transmission housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into place without distortion. Verify the seal orientation matches the original part to ensure proper sealing. Lubricate the seal lip lightly with transmission fluid before installation to reduce initial wear.

Quality Assurance and Warranty Information

National manufactures the 340797 shift shaft seal to meet industry standards for durability and performance. The nitrile material offers resistance to oil and heat degradation, contributing to a longer service life. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, providing confidence in the product's reliability.