National HM804846 Differential Pinion Bearing - Front Inner or Rear Inner

Overview of National HM804846 Differential Pinion Bearing

The National HM804846 differential pinion bearing is engineered for reliable driveline performance in select GM and Dodge vehicles. Designed as a taper bearing cone, this part ensures smooth rotation and durability in demanding axle applications.

• Precision cone bore diameter of 1.8750 inches (47.625 mm)
• Cone length measures 1.1563 inches (29.37 mm) for accurate fitment
• Cone radius of 0.1400 inches (3.556 mm) supports proper bearing seating
• Compatible with a wide range of Cadillac, Chevrolet, Dodge, GMC, Hummer, Oldsmobile, Pontiac, and Ram models
• Part number HM804846 for easy identification and replacement

Technical Specifications and Compatibility

This National differential pinion bearing cone features a precise cone bore of 1.8750 inches (47.625 mm) and a cone length of 1.1563 inches (29.37 mm), critical dimensions for maintaining proper gear alignment and load distribution within the differential assembly. The cone radius of 0.1400 inches (3.556 mm) ensures a secure fit and optimal bearing contact surface. This bearing is designed to meet OEM standards for durability and performance.

Compatible with various models including Chevrolet Silverado 1500, 2500, and 3500 series, Cadillac Escalade and DeVille, Dodge Ram 1500 through 3500, GMC Sierra and Yukon, Hummer H2, Pontiac Bonneville, Oldsmobile 88 and 98, and more. This part is suitable for vehicles requiring a differential pinion bearing cone with these exact dimensions.

Applications and Problem Resolution

The National HM804846 differential pinion bearing is used in the differential assembly to support the pinion gear, allowing it to rotate smoothly and maintain proper gear mesh. It addresses several common driveline issues:

• Eliminates excessive pinion gear play and noise
• Prevents premature wear of differential gears
• Reduces vibration and harshness in the driveline
• Maintains proper gear alignment under load
• Supports reliable torque transfer in heavy-duty applications

Installation Notes and Tips

• Ensure the bearing cone bore and length match the vehicle’s specifications before installation
• Use proper tools to press the bearing cone onto the pinion shaft without damage
• Check for correct preload and backlash settings after installation
• Inspect mating surfaces and clean thoroughly to avoid contamination
• Refer to the vehicle’s service manual for torque specifications and assembly procedures

Quality Assurance and Warranty

National bearings are manufactured to meet stringent quality standards, ensuring consistent performance and durability. The HM804846 differential pinion bearing undergoes rigorous testing to comply with OEM requirements. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.