National 710714 Manual Transmission Shift Shaft Seal

Overview of National 710714 Manual Transmission Shift Shaft Seal

The National 710714 manual transmission shift shaft seal is engineered to provide reliable sealing performance for a variety of European vehicles. Designed with durable nitrile material, this oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Inside diameter: 15.000 mm (0.591 inch)
• Outside diameter: 21.200 mm (0.835 inch)
• Thickness: 5.000 mm (0.197 inch)
• Overall width with side lip: 7.000 mm (0.276 inch)
• Sealing material: Nitrile for enhanced durability and resistance
• Compatible with housing bore size: 21.000 mm (0.827 inch)

Technical Details and Specifications

The National 710714 shift shaft seal is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. This seal features a precise inside diameter of 15 mm to fit the shift shaft snugly, while the outside diameter of 21.2 mm ensures a secure fit within the transmission housing bore. The thickness of 5 mm and an overall width of 7 mm with side lip provide effective sealing to prevent oil leakage and protect internal transmission components from dirt and debris.

Compatible Vehicles and Fitment

This manual transmission shift shaft seal is compatible with a range of European makes and models, including Aston Martin, BMW, Cadillac, Jaguar, Mercedes-Benz, and Volvo. It fits specific BMW models such as the 1 Series M, 135i, 228i, 320i, 328i, 335i, 428i, 525i, 535i, M2, M3, M4, M5, and others. It also suits Mercedes-Benz models like the C230, C300, SLK350, and Volvo and Jaguar vehicles requiring a 15 mm shaft seal. The part number 710714 ensures precise identification for these applications.

Common Applications and Problem Solving

• Prevents manual transmission fluid leaks around the shift shaft
• Protects transmission internals from dirt and contaminants
• Reduces wear on shift shaft components by maintaining proper lubrication
• Helps maintain smooth gear shifting performance
• Addresses issues related to worn or damaged shift shaft seals causing fluid loss

Installation Notes and Tips

When installing the National 710714 shift shaft seal, ensure the transmission housing bore is clean and free of debris. Lubricate the seal lip lightly with transmission fluid or compatible grease before installation to prevent damage. Use appropriate tools to press the seal evenly into the bore without distortion. Verify the seal is seated flush and inspect for any signs of damage before reassembling the transmission components.

Quality Assurance and Warranty

National manufactures the 710714 shift shaft seal to meet industry standards for durability and performance. The nitrile material offers resistance to oil and heat, contributing to long service life. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring reliability for your manual transmission repair needs.