National 30209-C Axle Differential Bearing - Front or Rear

Overview of National 30209-C Axle Differential Bearing

The National 30209-C axle differential bearing is engineered for reliable performance in various Nissan and INFINITI vehicles. Designed as a taper bearing assembly, this part ensures smooth driveline operation and durability under demanding conditions.

• Bore diameter: 1.7717 inches (45.00 mm)
• Cone length: 0.7480 inches (19.00 mm)
• Cone radius: 0.0787 inches (2.00 mm)
• Cup length: 0.6299 inches (16.00 mm)
• Cup radius: 0.0787 inches (2.00 mm)
• Outside diameter: 3.3465 inches (85.00 mm)
• Width: 0.8169 inches (20.75 mm)
• Design: Iso metric taper bearing
• Type: TS series 30200
• Standout: 0.1280 inches (3.25 mm)

Technical Details and Specifications

The National 30209-C axle differential bearing features an ISO metric design optimized for precise fit and function. With a bore size of 1.7717 inches (45 mm) and an outside diameter of 3.3465 inches (85 mm), this bearing supports axle shafts in Nissan and INFINITI models such as the 240SX, 300ZX, Pathfinder, and Q45. The cone and cup lengths and radii are engineered to maintain proper preload and reduce friction within the differential assembly. The standout dimension of 0.1280 inches (3.25 mm) ensures correct bearing positioning and load distribution.

Compatible Vehicles and Applications

This axle differential bearing is compatible with a range of Nissan and INFINITI vehicles, including but not limited to:

• Nissan 200SX, 240SX, 280ZX, 300ZX
• Nissan 720, D21, Frontier, Pickup, Xterra
• Nissan Pathfinder and Pathfinder Armada
• INFINITI J30, M30, Q45, QX4

It is designed to replace worn or damaged axle differential bearings in these models, restoring driveline smoothness and reliability.

Common Issues Addressed by National 30209-C Bearing

• Eliminates axle shaft play and vibration
• Reduces differential noise caused by worn bearings
• Prevents premature wear of axle components
• Maintains proper differential gear alignment
• Improves overall driveline efficiency and longevity

Installation Notes and Tips

Proper installation of the National 30209-C bearing requires careful attention to bearing preload and seating. Use appropriate tools to press the bearing into place without damaging the cone or cup surfaces. Verify the standout dimension to ensure correct positioning. It is recommended to inspect related components such as seals and races during installation and replace if necessary to maintain optimal performance.

Quality Assurance and Warranty

National bearings are manufactured to meet strict ISO metric standards, ensuring consistent quality and durability. The 30209-C axle differential bearing undergoes rigorous testing to comply with OEM specifications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.