National M86649 Transfer Case Output Shaft Bearing

National Transfer Case Output Shaft Bearing Overview

The National M86649 Transfer Case Output Shaft Bearing is engineered to provide reliable support and smooth operation for transfer cases in a wide range of vehicles. Designed with precise dimensions, this taper bearing cone ensures optimal fitment and durability for models including Audi, BMW, Ford, Toyota, and Volkswagen.

• Part Number: M86649
• Category: Transfer Case > Bearings
• Type: Transfer Case Output Shaft Bearing (Taper Bearing Cone)
• Cone Bore Diameter: 1.1875 inches (30.163 mm)
• Cone Length: 0.8438 inches (21.433 mm)
• Cone Radius: 0.0620 inches (1.575 mm)
• Compatible with multiple makes and models including Audi 80, BMW 318i, Ford Explorer, Toyota Camry, and Volkswagen Golf

Technical Specifications and Design Details

This National transfer case bearing features a taper bearing cone design, which is critical for supporting the output shaft within the transfer case assembly. The cone bore measures 1.1875 inches (30.163 mm), providing a precise fit to the shaft. The cone length of 0.8438 inches (21.433 mm) and cone radius of 0.0620 inches (1.575 mm) contribute to the bearing’s ability to handle axial and radial loads effectively. These dimensions ensure compatibility with a broad range of transfer cases found in vehicles such as the BMW 320i, Ford F-150, and Toyota Tacoma.

Applications and Common Issues Addressed

• Supports smooth rotation of the transfer case output shaft
• Reduces wear and tear on transfer case components
• Prevents excessive noise and vibration during drivetrain operation
• Addresses bearing failure symptoms such as rough shifting or drivetrain binding
• Helps maintain proper alignment and load distribution within the transfer case

Installation Notes and Tips

When installing the National M86649 bearing, ensure the transfer case output shaft and bore are clean and free of debris. Proper lubrication is essential to extend bearing life and prevent premature wear. Use appropriate tools to press the bearing cone into place without damaging the bearing surfaces. Verify fitment compatibility with your specific vehicle model, such as the Audi 90 or Ford Ranger, before installation.

Quality Assurance and Warranty Information

National bearings are manufactured to meet industry standards for durability and performance. The M86649 transfer case output shaft bearing undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.