FAG SS2873 Differential Pinion Seal - Front, Rear or Rear Outer

FAG SS2873 Differential Pinion Seal

FAG SS2873 is a differential pinion seal built for rear axle sealing applications on select Jeep vehicles. It uses a metal and spring seal design with polyacrylate sealing material to help retain lubricant and keep contamination out of the axle assembly.

With precise dimensions and application-specific fitment, this seal is a direct replacement choice for Jeep Wrangler, Cherokee, Grand Cherokee, Comanche, Wagoneer, J10, J20, CJ5, CJ7, and Scrambler rear axle service.

Key Features

• Part number: SS2873
• Seal type: metal with spring
• Sealing material: polyacrylate
• Bore diameter: 2.75 in. (69.85 mm)
• Seal outside diameter: 2.754 in. (69.952 mm)
• Seal width: 1.844 in. (46.838 mm)
• Designed for rear differential pinion sealing applications
• Cross-references National 470331N and SKF 18444 for the same application

Detailed Description

FAG SS2873 is engineered for rear axle sealing where the pinion area must stay protected from dirt, dust, and moisture while helping preserve gear oil inside the differential. The metal-and-spring construction supports a secure sealing interface, and the polyacrylate sealing material is selected for demanding driveline service. This makes it a practical replacement for Jeep rear axle maintenance when the original seal shows wear, leakage, or contamination.

Compatible With 1976-2007 Jeep applications, this seal appears on rear and rear outer positions across multiple models, including Jeep Wrangler rear outer, Jeep Cherokee rear, and Jeep Grand Cherokee rear. It also matches several classic Jeep platforms such as CJ5, CJ7, Scrambler, Wagoneer, J10, and J20. The FAG SS2873 part number is also referenced by interchange numbers used in the aftermarket and OE service channels.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the rear axle seal surface
• Wear-related sealing loss from age or mileage
• Moisture and debris intrusion around the axle end
• Service replacement for damaged or hardened seals

Installation Notes and Tips

Verify the axle position, seal dimensions, and vehicle application before installation. This seal is listed for rear and rear outer positions depending on the Jeep model and year, so confirm the exact axle configuration on the vehicle. Inspect the pinion surface and surrounding components for scoring, rust, or debris before pressing in the new seal. Clean mating surfaces thoroughly to support proper sealing performance.

Quality Assurance

FAG sources seals using high-quality materials and application-specific specifications to meet vehicle manufacturer requirements. The SS2873 is built to the dimensional and material standards expected for driveline sealing service on Jeep rear axle applications.