National A-49 Wheel Bearing and Race Set - Rear
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National

National A-49 Wheel Bearing and Race Set - Rear

Brand National A-49
Position Rear
Cone Bore (Inch) 1.3775
Cone Bore (MM) 34.9890
Cone Length (Inch) 0.8110
Cone Length (MM) 20.5990
Cone Radius (Inch) 0.0900
Cone Radius (MM) 2.2860
Cup Bore (Inch) 2.5581
Cup Bore (MM) 64.9760
Cup Length (Inch) 0.6693
Cup Length (MM) 17.0000
Cup Radius (Inch) 0.0500
Cup Radius (MM) 1.2700
Footnote Components Not Available Seperately
Part Description Taper Bearing Set
Taper Bearing Cone NP182140
Taper Bearing Cup NP645406
Width (Inch) 0.8110
Width (mm) 20.5990
Fits Jeep · 7 vehicles

Taper bearing set. Crowned raceways and rollers promote even load distribution.

Premium-grade steel. Built with durable steel for dependable bearing performance.

Components are not available separately.

Cross-references Spicer 566075, 5012825AA and 05012825AA for the same application. See all 5.

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National A-49 Rear Wheel Bearing Set

National A-49 is a taper bearing and race set built with premium-grade steel for rear axle service. The crowned raceways and rollers help distribute load evenly, making this National wheel bearing set a direct-fit service part for select Jeep applications, including Jeep Grand Cherokee rear and Jeep Liberty rear fitments.

Key Features

  • Premium-grade steel construction for bearing and race durability
  • Crowned raceways and rollers for even load distribution
  • Taper bearing cone and cup design for rear wheel service
  • National A-49 part number for catalog and cross-reference lookup
  • Fits 1999-2004 Jeep Grand Cherokee, rear
  • Fits 2002 Jeep Liberty, rear with Dana Spicer 35 axle

Detailed Description

This National A-49 wheel bearing and race set includes taper bearing cone NP182140 and cup NP645406, with dimensions that match the specified rear axle applications: cone bore 1.3775 in. (34.9890 mm), cone length 0.8110 in. (20.5990 mm), cup bore 2.5581 in. (64.9760 mm), and cup length 0.6693 in. (17.0000 mm). The tapered design supports controlled load transfer in rear wheel service, while the crowned contact surfaces help maintain consistent bearing contact under operating load. This part cross-references Spicer 566075 for the same application.

What It Helps Address

  • Rear wheel bearing noise
  • Excessive wheel end play
  • Rough or uneven wheel rotation
  • Wear at the bearing and race contact surfaces
  • Service replacement for rear axle bearing wear on Jeep Grand Cherokee and Jeep Liberty

Installation Notes and Tips

Verify axle and fitment details before installation, especially on the 2002 Jeep Liberty with Dana Spicer 35 axle. Inspect the hub, spindle, and sealing surfaces for wear or scoring before pressing in the new bearing and race components. Clean all mating surfaces thoroughly and follow the vehicle service manual for bearing preload, torque, and lubrication specifications. Because the cone and cup are matched components, replace them as a set rather than mixing worn parts.

Quality Assurance

National manufactures this taper bearing set with premium-grade steel and precision race geometry for consistent service performance. The crowned raceways and rollers are engineered to support even load distribution in rear wheel bearing applications.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2004JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
2003JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
2002JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
2002JeepLibertyRearwith Dana Spicer 35 Axle; Taper Bearing Set Includes Cup and Cone
2001JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
2000JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
1999JeepGrand CherokeeRearTapered wheel bearing and race set with cup and cone design for optimal fitment.
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Spicer — 5660755012825AA05012825AABR103SET-31