National HM89446 Differential Pinion Bearing - Outer, Rear Inner or Rear Outer

National HM89446 Differential Pinion Bearing

National HM89446 is a taper bearing cone for differential pinion applications that demand precise load control and stable rotation. It uses premium-grade steel with crowned raceways and rollers to promote even load distribution in the axle assembly.

• Taper bearing cone for differential pinion service
• Premium-grade steel construction
• Crowned raceways and rollers for even load distribution
• Cone bore: 1.3750 in. / 34.9250 mm
• Cone length: 1.1250 in. / 28.5750 mm
• Cone radius: 0.1400 in. / 3.5560 mm
• Part number: HM89446

Fitment and application details

Compatible With rear inner differential pinion bearing applications on a wide range of vehicles, including Jaguar XK8, Jaguar XKR, Jaguar XJ8, Jaguar XJR, Jaguar XJS, Jaguar XJ6, Pontiac GTO, Pontiac Firebird, Chevrolet Camaro, BMW 318i, BMW 320i, and Chrysler 300 applications listed below. This part cross-references Monroe Shocks & Struts 900064 for the same application.

• Fits 1997-2006 Jaguar XK8, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 2000-2006 Jaguar XKR, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 2004-2006 Pontiac GTO, rear inner; with 8 in. ring gear; with Spicer M80 axle; independent rear suspension
• Fits 1982-2003 Jaguar Vanden Plas, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1998-2003 Jaguar XJ8, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1995-2003 Jaguar XJR, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1972-1997 Jaguar XJ6, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1994-1996 Jaguar XJ12, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1981-1992 Jaguar XJ12, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1973-1979 Jaguar XJ12, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1976-1996 Jaguar XJS, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1989-1994 Aston Martin Virage, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1993 Jaguar XJRS, rear inner; fits Salisbury 4HU axle with differential pinion bearing
• Fits 1985-1991 Pontiac Firebird, rear inner; with 7.75 in. ring gear; with Borg-Warner M78 differential
• Fits 1987-1990 Chevrolet Camaro, rear inner; with 7.75 in. ring gear; with Borg-Warner M78 differential
• Fits 1984-1985 BMW 318i, rear inner; with 6.6142 in. ring gear; with BMW 168 differential
• Fits 1980-1983 BMW 320i, rear inner; with 6.6142 in. ring gear; with BMW 168 differential
• Fits 1966-1971 Chrysler 300, rear inner; casting #741; with 8.75 in. ring gear; with Chrysler axle
• Fits 1966-1971 Dodge Dart, rear inner; casting #741; with 8.75 in. ring gear; with Chrysler axle
• Fits 1959-1962 Buick LeSabre, rear outer; with GMC axle

Common repair uses

• Restores smooth pinion bearing operation in the differential
• Addresses bearing wear that can create gear noise
• Helps correct rough rotation or looseness in the axle assembly
• Supports repair of rear axle service on Jaguar, Pontiac, BMW, Chrysler, and Dodge applications
• Replaces a worn taper bearing cone during differential rebuilds

Installation notes and quality

Verify cone bore, cone length, and axle configuration before installation, especially on Salisbury 4HU, Spicer M80, Borg-Warner M78, BMW 168, and Chrysler axle applications. Proper bearing setup, preload, and lubrication are critical during differential service. National manufactures this taper bearing cone with premium-grade steel and crowned raceways and rollers to support even load distribution in the pinion bearing position.

National HM89446 is a direct-fit differential pinion bearing cone for the listed rear inner and rear outer applications, including Jaguar XK8, Jaguar XKR, and Pontiac GTO fitments.