National 30208 Manual Transmission Differential Bearing

National 30208 Manual Transmission Differential Bearing Overview

The National 30208 manual transmission differential bearing is engineered for reliable performance in a wide range of vehicles including Acura, Honda, Toyota, Nissan, and Ford models. Designed as a taper bearing assembly, this part ensures smooth differential operation and durability under demanding driving conditions.

• Bore diameter: 1.5748 inches (40 mm)
• Outside diameter: 3.1496 inches (80 mm)
• Cone length: 0.7087 inches (18 mm)
• Cup length: 0.6299 inches (16 mm)
• Width: 0.7776 inches (19.75 mm)
• Design: Iso metric taper bearing assembly
• Standout dimension: 0.1477 inches (3.75 mm)

Technical Details and Specifications

The National 30208 bearing features an ISO metric design with precise dimensions to fit manual transmission differentials requiring a taper bearing assembly. The cone and cup radii are both 0.0800 inches (2.032 mm), providing consistent load distribution and reducing wear. The bearing’s 80 mm outside diameter and 40 mm bore diameter make it compatible with various manual transmission systems found in vehicles such as the Honda Accord, Toyota Corolla, Nissan 300ZX, and Ford Ranger.

Compatible Vehicles and Applications

This manual transmission differential bearing is compatible with a broad range of makes and models, including Acura TSX, Chevrolet Cobalt, Dodge Ram 50, Ford F-series, Geo Tracker, Honda Civic, Infiniti QX56, Isuzu Trooper, Mazda 3000GT, Mercedes-Benz 300SE, Mitsubishi Montero, Nissan 280ZX, Pontiac Pursuit, Saab 9-3, Saturn Ion, Subaru WRX STI, Suzuki Swift, and Toyota Tacoma.

Common Issues Addressed by National 30208 Bearing

• Eliminates differential noise caused by worn or damaged bearings
• Reduces vibration and improves smoothness in manual transmission operation
• Prevents premature wear of differential gears due to improper bearing fit
• Restores proper alignment and load distribution within the differential assembly
• Helps maintain transmission efficiency and prolongs drivetrain life

Installation Notes and Tips

Ensure the bearing bore and housing are clean and free of debris before installation. Use proper tools to press the bearing into place without damaging the cone or cup surfaces. Verify the standout dimension of 0.1477 inches (3.75 mm) to maintain correct preload and clearance in the differential assembly. Consult the vehicle’s service manual for torque specifications and bearing adjustment procedures specific to the make and model.

Quality Assurance and Warranty

National bearings are manufactured to meet strict ISO standards for quality and durability. The 30208 manual transmission differential bearing undergoes rigorous testing to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, National products typically come with manufacturer-backed quality guarantees to support reliable performance in automotive applications.