National 25584 Axle Differential Bearing - Rear, Rear Inner or Rear Outer

National 25584 Axle Differential Bearing

National 25584 is a taper bearing cone for axle differential service, built with premium-grade steel and crowned raceways and rollers to promote even load distribution. It is a direct-fit service part for rear applications on select Buick, Oldsmobile, and Pontiac vehicles with GMC axle configurations.

Key Features

• Taper bearing cone for axle differential applications
• Premium-grade steel construction
• Crowned raceways and rollers for even load distribution
• Cone bore: 1.7710 in. / 44.9830 mm
• Cone length: 1.0000 in. / 25.4000 mm
• Cone radius: 0.0620 in. / 1.5750 mm
• National part number 25584 for service identification

Detailed Description

National 25584 is engineered as a taper bearing cone for driveline and axle repair where precise roller support and stable load handling matter. The crowned raceway and roller profile helps distribute load more evenly across the bearing surface, while the premium-grade steel construction supports dependable operation in rear axle differential service. This part number 25584 is used in rear applications on vehicles such as the Buick LeSabre, Buick Riviera, Oldsmobile 98, Oldsmobile Cutlass, Pontiac Bonneville, Pontiac Catalina, Pontiac Grand Prix, Pontiac GTO, Pontiac LeMans, Pontiac Laurentian, Pontiac Parisienne, and Pontiac Tempest with GMC axle setups.

This part cross-references SKF BR25584 for the same application.

Vehicle Fitment

• Fits 1963-1964 Buick LeSabre, Rear, with GMC Axle
• Fits 1963-1964 Buick Riviera, Rear, with GMC Axle
• Fits 1953-1964 Oldsmobile 98, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1961-1964 Oldsmobile Starfire, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1954-1957 Oldsmobile Starfire, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1957-1964 Pontiac Bonneville, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1953-1964 Pontiac Catalina, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1962-1964 Pontiac Grand Prix, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1964 Pontiac GTO, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1959-1964 Pontiac Laurentian, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1963-1964 Pontiac LeMans, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1959-1964 Pontiac Parisienne, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1961-1963 Oldsmobile Cutlass, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1961-1963 Pontiac Tempest, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle
• Fits 1954-1957 Oldsmobile 88, Rear, compatible with Manual Transmission Input Shaft Bearing for vehicles with 9.25 inch Ring Gear and GMC Axle

Common Repair Uses

• Replacing a worn axle differential bearing that causes noise or rough operation
• Restoring proper roller support in the rear differential assembly
• Addressing bearing wear that can affect axle smoothness and driveline consistency
• Servicing rear axle components on classic Buick, Oldsmobile, and Pontiac applications

Installation Notes and Tips

Verify cone bore, cone length, and cone radius against the original bearing before installation. Inspect the mating race, axle components, and differential surfaces for wear or scoring, and replace damaged related parts as needed. Proper bearing setup, preload, and lubrication are important for long-term service life in rear axle applications.

Quality Assurance

National manufactures this taper bearing cone with premium-grade steel and a crowned roller/raceway design to support even load distribution in axle differential service. National 25584 is a service part identified for rear driveline repair on the listed Buick, Oldsmobile, and Pontiac applications.