National 27880 Differential Pinion Bearing - Rear Inner or Rear Outer

Overview of National 27880 Differential Pinion Bearing

The National 27880 differential pinion bearing is engineered for precision and durability in driveline applications. Designed specifically for high-performance vehicles such as the Audi R8, Ferrari Testarossa, and Lamborghini Gallardo, this bearing ensures reliable operation under demanding conditions.

• Taper bearing cone design for optimal load distribution
• Cone bore diameter of 1.5000 inches (38.1 mm)
• Cone length of 0.9330 inches (23.698 mm)
• Cone radius of 0.0310 inches (0.787 mm)
• Part number 27880 for accurate identification and fitment

Technical Specifications and Design Details

The National 27880 differential pinion bearing features a taper bearing cone that supports the pinion gear within the differential assembly. The cone bore measures precisely 1.5000 inches (38.1 mm), providing a secure fit on the pinion shaft. With a cone length of 0.9330 inches (23.698 mm), the bearing maintains proper alignment and load capacity. The cone radius of 0.0310 inches (0.787 mm) contributes to smooth rotation and reduced wear. These dimensions are critical for maintaining the integrity of the driveline in vehicles such as the Audi R8, Ferrari Testarossa, and Lamborghini Gallardo.

Compatible Vehicles and Applications

This differential pinion bearing is compatible with select high-performance models, including:

• Audi R8 differential assemblies
• Ferrari Testarossa driveline components
• Lamborghini Gallardo pinion gear setups

Part number 27880 is essential for technicians and enthusiasts seeking a precise replacement bearing for these specific applications.

Common Issues Addressed by the National 27880 Bearing

• Excessive pinion gear play causing drivetrain noise
• Premature bearing wear leading to differential failure
• Vibration and rough operation in the differential assembly
• Misalignment of the pinion gear shaft
• Reduced load capacity affecting vehicle handling

Installation Notes and Tips

Proper installation of the National 27880 differential pinion bearing requires careful attention to fitment dimensions. Ensure the cone bore matches the pinion shaft diameter of 1.5000 inches (38.1 mm). Use appropriate tools to press the bearing cone onto the shaft without damaging the bearing surfaces. Verify the cone length and radius to maintain correct bearing preload and alignment. It is recommended to inspect the differential housing and related components for wear before installation.

Quality Assurance and Warranty

National bearings are manufactured to meet stringent quality standards for durability and performance. The 27880 differential pinion bearing undergoes rigorous testing to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects. Consult product documentation or authorized sources for warranty terms related to this part number.