FAG SS2954 Differential Pinion Seal - Rear

Overview

FAG SS2954 is a differential pinion seal built for rear axle applications that require precise sealing and application-specific dimensions. It uses a metal and spring seal design with an auxiliary lip and nitrile sealing material to help keep contaminants out and retain lubricant at the bearing area.

Compatible with select Cadillac and Ford rear applications, this seal is specified by size and construction for direct application matching. The FAG SS2954 part number is also referenced in interchange listings for cross-checking during service work.

Key Features

• Metal, spring, and auxiliary lip seal design for controlled sealing performance
• Nitrile sealing material for common driveline sealing applications
• Specified bore diameter of 3.249 in. and seal outside diameter of 3.254 in.
• Seal width of 1.875 in. for application-specific fitment
• Fits rear differential pinion seal applications on select Cadillac and Ford models

Detailed Description

FAG SS2954 is engineered as a differential pinion seal for rear driveline service where contamination control and lubricant retention are critical. The seal construction combines metal support, a spring element, and an auxiliary lip with nitrile sealing material to help maintain a consistent seal under operating conditions. Dimensions are tightly specified, including a 3.249-inch bore diameter, 3.254-inch outside diameter, and 1.875-inch width, which makes application matching important. This part number, SS2954, is listed for rear fitments on Cadillac Calais, Cadillac Commercial Chassis, Cadillac DeVille, Cadillac Fleetwood, Ford F-100, Ford F-250, and Ford P-350 applications shown in the fitment data.

This part cross-references Gates 18922 and National 451078 for the same application.

What It Is Used For

• Stopping gear oil leakage at the differential pinion area
• Keeping dirt, dust, and moisture away from bearing components
• Maintaining lubricant retention over bearing service life
• Replacing a worn or hardened rear axle seal
• Restoring proper sealing in rear driveline service

Installation Notes and Tips

Verify the seal dimensions and rear application before installation. Clean the sealing surface and inspect the mating area for wear, scoring, or contamination that could affect sealing performance. Confirm the vehicle-specific application against the fitment data for Cadillac and Ford models before service. The SS2954 part number should be matched carefully to the axle and position listed for the vehicle.

Quality Assurance

FAG states that its seals are built to meet vehicle manufacturer specifications and are developed with suppliers to meet FAG quality standards. The seal design is intended to protect wheel-end components from contamination and help prevent grease loss over the life of the bearing.