National 5573 Wheel Seal Kit - Rear

National 5573 Wheel Seal Kit for Rear Axles

National 5573 is a rear wheel seal kit built around nitrile sealing material for service work on classic Chevrolet and Pontiac applications. It is sized for a 1.915 in. shaft diameter with a 2.548 in. outside diameter and 0.250 in. width, making it a direct-fit service option for rear axle seal replacement.

Key Features

• Wheel seal kit / oil seal kit for rear driveline service
• Nitrile sealing material for dependable sealing performance
• Inside diameter: 1.915 in. (48.640 mm)
• Outside diameter: 2.548 in. (64.720 mm)
• Thickness / width: 0.250 in. (6.350 mm)
• Contains 610145 O-ring
• Fits rear axle applications on select Chevrolet and Pontiac vehicles

Detailed Description

National 5573 is engineered for rear wheel seal service on select vintage GM vehicles, including 1958-1964 Chevrolet Bel Air rear, 1959-1960 Chevrolet El Camino rear, 1958-1964 Chevrolet Impala rear, 1958-1964 Pontiac Laurentian rear, 1959-1964 Pontiac Parisienne rear, and 1960-1962 Chevrolet Corvette rear without Posi-Traction. This part number, 5573, is also cross-referenced to Timken 5573S for the same application. National has more than 75 years of sealing experience, and this kit reflects that focus with a nitrile sealing design sized for the specified shaft and housing dimensions.

For buyers searching for a rear wheel seal kit for 1958-1964 Chevrolet Bel Air, Impala, or Corvette rear axle service, National 5573 provides the dimensional match needed for proper sealing at the wheel end of the driveline.

What It Helps Address

• Rear axle oil seepage at the wheel seal area
• Contamination entering the axle housing through a worn seal
• Noise or wear caused by low lubricant level from seal leakage
• Service replacement for aged rear wheel seals on classic GM vehicles
• Fitment-specific seal replacement during rear axle maintenance

Installation Notes and Tips

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the axle housing and spindle dimensions. Clean the sealing surface and inspect the axle shaft for wear, grooves, or corrosion that could affect sealing performance. This rear wheel seal kit is listed for rear position applications only, and the 1960-1962 Chevrolet Corvette fitment is specified without Posi-Traction.

Quality Assurance

National is a long-established sealing brand known for premium sealing solutions and ongoing product development for modern and legacy vehicles. The 5573 wheel seal kit is built to the listed dimensions and material specification for service use on the confirmed applications.