National 223340 Manual Transmission Output Shaft Seal - Front or Left

Overview of National 223340 Manual Transmission Output Shaft Seal

The National 223340 manual transmission output shaft seal is engineered to provide reliable sealing performance for select Audi, INFINITI, Mercury, and Nissan vehicles. Designed with precision, this oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.299 inches (33.000 mm)
• Outside diameter: 1.858 inches (47.200 mm)
• Thickness: 0.315 inches (8.000 mm)
• Sealing material: Nitrile for durability and resistance to oil
• Counter-clockwise-spiral lip design for effective sealing
• Compatible housing bore: 1.850 inches (47.000 mm)
• Part number: 223340

Technical Details and Material Specifications

This National manual transmission output shaft seal (part number 223340) is constructed from nitrile, a synthetic rubber known for its excellent resistance to petroleum-based oils and fluids. The seal features a counter-clockwise-spiral lip design that enhances sealing efficiency by maintaining consistent contact with the shaft, reducing the risk of leaks. With an inside diameter of 1.299 inches and an outside diameter of 1.858 inches, it fits precisely within a 1.850-inch housing bore, ensuring a secure installation. The 0.315-inch thickness provides durability while accommodating shaft movement.

Compatible Vehicles and Applications

This output shaft seal is compatible with a range of vehicles including Audi S4 and S5 models, INFINITI J30, M30, Quest, and Villager, Mercury Villager, and Nissan 200SX, 300ZX, D21, Maxima, Pathfinder, Pickup, and Pulsar NX. It is specifically designed for manual transmission systems requiring a 32-type seal with the specified dimensions.

Common Issues Addressed by the National 223340 Seal

• Prevents transmission fluid leaks from the output shaft area
• Reduces contamination ingress that can damage transmission components
• Minimizes wear on the output shaft by maintaining proper lubrication
• Helps maintain transmission pressure and performance
• Prevents premature seal failure due to material degradation

Installation Notes and Tips

Ensure the housing bore and shaft are clean and free of debris before installation. Use appropriate tools to press the seal evenly into the bore without distortion. Verify the seal’s orientation matches the counter-clockwise-spiral lip design for optimal sealing. Lubricate the sealing lip lightly with transmission fluid to reduce initial wear during startup. Check for proper fitment on the specific vehicle model to avoid leaks or damage.

Quality Assurance and Warranty

National transmission seals are manufactured to meet industry standards for durability and performance. The nitrile material and design specifications ensure resistance to oil and heat commonly encountered in manual transmissions. Part number 223340 is backed by National’s quality control processes, providing confidence in its reliability. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.