FAG SS2947 Differential Pinion Seal - Front, Rear or Rear Rearward

FAG SS2947 Differential Pinion Seal

The FAG SS2947 differential pinion seal is built for rear axle sealing applications that demand accurate dimensions and dependable contamination control. It uses a metal and spring design with an auxiliary lip to help keep gear oil where it belongs while blocking dirt, dust, and moisture at the pinion area.

Key Features

• Part number: SS2947
• Seal type: metal, spring, auxiliary lip
• Sealing material: polyacrylate
• Bore diameter: 3.16 in. / 80.264 mm
• Seal outside diameter: 3.165 in. / 80.391 mm
• Seal width: 1.875 in. / 13.487 mm
• Built for rear differential pinion sealing applications
• Cross-reference: Gates 18888

Detailed Description

FAG SS2947 is a rear differential pinion seal engineered to match demanding axle sealing requirements across a wide range of trucks and utility vehicles. The polyacrylate sealing material and auxiliary lip help maintain a stable seal at the pinion yoke, while the spring-loaded metal construction supports consistent contact under operating conditions. This part number also cross-references National 6808N for the same application.

Compatible vehicle coverage includes rear applications on Ford F-350, GMC C3500, Jeep J10, Dodge B-series vans, and Chevrolet Blazer models, along with additional rear axle fitments across Ford, GMC, Jeep, Dodge, Plymouth, Chevrolet, and Lincoln platforms. For buyers searching by application, FAG SS2947 is a direct-fit rear differential pinion seal for many classic truck and van axle setups.

What It Helps Address

• Gear oil leakage at the rear pinion area
• Contamination from dirt, dust, and moisture entering the axle
• Loss of lubricant around the pinion yoke
• Seal wear caused by age, heat, and road exposure
• Service issues on rear axle rebuilds and differential maintenance

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation. Confirm axle type, yoke style, and rear position against the vehicle listing, especially on Dodge Spicer 70 axle applications and other noted configurations. Inspect the pinion yoke surface for grooves or wear before pressing in the new seal, and replace any damaged sealing surface to help maintain proper contact.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain FAG quality standards. The SS2947 is built for demanding wheel-end and axle sealing environments where accurate fit and contamination control matter.