National 108 Transfer Case Output Shaft Bearing

Overview of National Transfer Case Output Shaft Bearing 108

The National Transfer Case Output Shaft Bearing 108 is engineered for reliable performance in various transfer case applications. Designed as a single row radial ball bearing, it supports smooth rotation and durability for vehicles including BMW, Ford, Dodge, and more.

• Single row radial design for efficient load handling
• Bore diameter of 1.575 inches (40 mm) for precise fitment
• Outer diameter of 2.677 inches (68 mm) ensuring compatibility with transfer case shafts
• Width of 0.591 inches (15 mm) for compact installation
• Inner and outer race radii of 0.040 inches (1.016 mm) for optimized stress distribution

Technical Specifications and Design Details

This National bearing features a 40 mm bore and 68 mm outside diameter, making it suitable for transfer case output shafts requiring these dimensions. The single row radial ball bearing design provides balanced radial load capacity, essential for transfer case operation. Both inner and outer races have a width of 15 mm, maintaining consistent bearing thickness for proper shaft alignment. The inner race bore and radius measurements ensure a secure fit and smooth rotation under load.

Compatible Vehicles and Applications

This transfer case output shaft bearing is compatible with a wide range of vehicles, including BMW models such as the 328i xDrive, 335i xDrive, and 740i xDrive, as well as Ford trucks like the Ranger and Bronco II. It also fits Chrysler, Dodge, INFINITI, Mazda, and Mitsubishi models requiring a 40 mm bore bearing in the transfer case output shaft.

• Supports transfer case output shaft rotation in BMW 330i xDrive and 535i GT xDrive
• Compatible with Ford Aerostar and Ram 1500 transfer cases
• Suitable for Dodge Durango and Chrysler Aspen transfer case repairs

Common Issues Addressed by Part Number 108

• Eliminates transfer case noise caused by worn or damaged output shaft bearings
• Prevents transfer case shaft misalignment and vibration
• Reduces premature wear on transfer case components due to bearing failure
• Restores smooth power transfer in four-wheel and all-wheel drive systems

Installation Notes and Tips

Ensure the transfer case output shaft and housing are clean and free of debris before installing the bearing. Use appropriate tools to press the bearing onto the shaft without applying excessive force to avoid damage. Verify the bearing is seated fully and rotates smoothly before reassembling the transfer case. Consult vehicle-specific service manuals for torque specifications and installation procedures.

Quality Assurance and Warranty

National bearings are manufactured to meet industry standards for durability and precision. The 108 transfer case output shaft bearing undergoes strict quality control to ensure consistent performance. While specific warranty details are not provided, National products typically come with manufacturer-backed quality assurance to support reliable operation in automotive applications.