National HM807046 Differential Pinion Bearing - Rear Inner

Overview of National HM807046 Differential Pinion Bearing

The National HM807046 differential pinion bearing is engineered for reliable driveline performance in select Chevrolet, Dodge, GMC, and Ram vehicles. Designed as a taper bearing cone, this part supports smooth differential operation in heavy-duty trucks and SUVs.

• Compatible with Chevrolet Silverado 3500, Sierra 1500, and Camaro models
• Fits Dodge Ram 2500, Ram 3500, and Express 3500 vehicles
• Precision cone bore diameter of 2.0000 inches (50.8 mm)
• Cone length measures 1.4375 inches (36.513 mm) for accurate fitment
• Cone radius of 0.1400 inches (3.556 mm) ensures proper bearing seating

Technical Specifications and Design Details

The HM807046 is a taper bearing cone designed to fit differential pinion assemblies requiring a 2-inch cone bore. Its precise dimensions include a cone length of 1.4375 inches and a cone radius of 0.1400 inches, which are critical for maintaining correct preload and alignment within the differential. Manufactured by National, this bearing is suitable for use in driveline and axle applications where durability and dimensional accuracy are essential.

Compatible Vehicles and Applications

This differential pinion bearing is compatible with a range of Chevrolet, Dodge, GMC, and Ram models, including Chevrolet Silverado 3500 Classic and HD, Sierra 3500 Classic and HD, Camaro, Dodge Ram 2500 and 3500, Express 3500, and P30 series vehicles. The part number HM807046 ensures precise replacement for these specific applications, supporting proper differential function and driveline reliability.

Common Issues Addressed by HM807046 Bearing

• Eliminates excessive differential noise caused by worn pinion bearings
• Prevents premature wear and damage to differential gears
• Restores proper pinion gear alignment and preload
• Reduces vibration and driveline harshness in heavy-duty trucks
• Supports smooth torque transfer and axle performance

Installation Notes and Tips

• Ensure the differential housing and pinion shaft are clean and free of debris before installation
• Use proper tools to press the bearing cone onto the pinion shaft without damaging the bearing surface
• Verify bearing preload and backlash specifications according to vehicle service manual
• Inspect related components such as races and seals for wear and replace if necessary
• Lubricate bearing surfaces with recommended gear oil during assembly

Quality Assurance and Warranty Information

National manufactures the HM807046 differential pinion bearing to meet industry standards for durability and dimensional accuracy. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship. This bearing is designed to provide consistent performance in demanding automotive driveline applications.