National 710316 Manual Transmission Input Shaft Seal

Overview of National Manual Transmission Input Shaft Seal 710316

The National 710316 manual transmission input shaft seal is engineered to provide reliable sealing performance for a range of vehicles including Audi, Lexus, Nissan, Porsche, Toyota, Volkswagen, and INFINITI models. Designed with durable nitrile material and a clockwise-spiral lip design, this seal helps maintain transmission integrity by preventing oil leaks and contamination.

• Inside diameter: 0.984 inch (25.000 mm)
• Outside diameter: 1.583 inch (40.200 mm)
• Thickness/width: 0.315 inch (8.000 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Helix type: Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 1.575 inch (40.000 mm)
• Part number: 710316, series 710300

Technical Description and Material Details

This manual transmission input shaft seal from National is constructed from nitrile, a synthetic rubber known for its excellent resistance to petroleum-based oils and fluids. The seal features a clockwise-spiral lip design that enhances sealing efficiency by directing contaminants away from the shaft. With precise dimensions including a 0.984 inch inside diameter and 1.583 inch outside diameter, it fits securely within a 1.575 inch housing bore. The 0.315 inch thickness ensures durability and proper sealing pressure, making it suitable for demanding transmission environments.

Compatible Vehicles and Applications

The National 710316 input shaft seal is compatible with a variety of manual transmission models from Audi, INFINITI, Lexus, Nissan, Porsche, Toyota, and Volkswagen. Specific vehicle models include Audi 80, 90, 100, 200, and their Quattro variants; Nissan 200SX and Pulsar; Porsche 924, 944, 4000, and 5000 Quattro; Toyota Avalon, Camry, Highlander, Prius variants, RAV4; Volkswagen Passat and EuroVan; as well as Lexus ES300h, HS250h, NX, RX450h, and INFINITI G20. This part number 710316 is designed to meet the exact fitment requirements of these vehicles' manual transmissions.

Common Issues Addressed by the Input Shaft Seal

• Prevents oil leaks from the manual transmission input shaft
• Protects transmission internals from dirt and debris contamination
• Maintains proper lubrication within the transmission system
• Reduces risk of premature transmission wear due to fluid loss
• Helps avoid costly transmission repairs related to seal failure

Installation Notes and Tips

When installing the National 710316 input shaft seal, ensure the transmission housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design to optimize sealing performance. It is recommended to inspect the shaft surface for wear or damage before installation to ensure a proper seal. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

National manufactures the 710316 input shaft seal to meet industry standards for durability and performance. The nitrile material and precision engineering provide reliable sealing under normal operating conditions. This part is backed by National's quality assurance processes, ensuring consistent fit and function. Warranty coverage details should be confirmed through the original equipment manufacturer or authorized distributors.