NATIONAL
More Information for NATIONAL RA321
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National® Oil Seals & Bearings has built a reputation as one of the most respected names in the industry. They have offered premium sealing and wheel end solutions for more than 75 years. Their design and engineering teams keep pace with the industry and provide advanced solutions for today's vehicles.

Features & Benefits:
  • Spindle bearing and seal kit
  • Includes all components required to complete the repair
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
Determine your Differential Type to help you order the correct replacement part.

Which Differential Rebuild Kit Is Right For You?

Kit Type Typical Contents
(Actual Contents Vary By Brand / Application)
Standard • Pinion Bearings & Races
• Carrier Bearings & Races
• Pinion Nut & Seal (where applicable)
• Crush Sleeve or Preload Shims (where applicable)
• Various Sealants / Marking Compounds
Master Standard Kit, Plus:
• Ring Gear Bolts
• Carrier & Pinion Shims (where applicable)
Mega Master Kit, Plus:
• Axle Bearings & Seals
Super Mega Kit, Plus:
• Differential Ring and Pinion


NATIONAL Warranty Information:
12 Months