FAG SS2955 Differential Pinion Seal - Rear or Rear Rearward

FAG SS2955 Differential Pinion Seal for Cadillac Rear Axles

The FAG SS2955 differential pinion seal is built for rear axle sealing applications where contamination control and lubricant retention matter. It uses nitrile sealing material with a rubber, spring, and inner shell design to help maintain a tight seal at the pinion area.

Compatible with select 1946-1959 Cadillac rear applications, including Commercial Chassis and DeVille models, this seal is sized for the specified bore and outside diameter requirements. The FAG SS2955 is a direct-fit sealing solution for restoration and repair work on classic Cadillac driveline assemblies.

Key Features

• Brand: FAG
• Part number: SS2955
• Part type: Differential Pinion Seal
• Seal type: Rubber; Spring; Inner Shell
• Sealing material: Nitrile
• Bore diameter: 3.744 in / 95.098 mm
• Seal outside diameter: 3.749 in / 95.225 mm
• Seal width: 1.875 in / 47.625 mm
• Rear position application

Detailed Description

FAG SS2955 is a rear differential pinion seal designed for classic Cadillac driveline service. It is specified for rear applications on 1946-1959 Cadillac Commercial Chassis and DeVille models, with notes for certain carrier and housing configurations. The nitrile sealing element and spring-loaded construction help maintain contact at the sealing surface while protecting the differential from dirt, dust, and moisture intrusion. This part number, SS2955, is also referenced in interchange listings for related applications.

This part cross-references Four Seasons 18948 for the same application.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the rear axle housing
• Seal wear from age-related hardening or cracking
• Loss of lubricant around the pinion shaft seal surface
• Service needs on classic Cadillac rear driveline assemblies

Installation Notes and Tips

Verify the axle housing, carrier, and yoke configuration before installation, especially on 1946-1959 Cadillac Commercial Chassis and DeVille rear applications. Confirm bore diameter, outside diameter, and seal width against the original seal and housing dimensions before pressing the seal into place. Clean the sealing surface thoroughly and inspect the pinion yoke for wear or grooves that could affect sealing performance.

Quality Assurance

FAG designs seals using high-quality materials and application-specific specifications to meet vehicle manufacturer requirements. This SS2955 differential pinion seal is built to support reliable rear axle sealing in the listed Cadillac applications.