FAG SS3119 Differential Pinion Seal - Rear

Rear Differential Pinion Seal for GM Applications

FAG SS3119 is a rear differential pinion seal built for specific GM driveline applications that use 8.50-inch or 8.625-inch ring gear setups. It is engineered with Viton sealing material and a metal, spring, auxiliary-lip design to help maintain a clean, stable seal at the pinion area.

Use this seal when servicing rear axle leaks on vehicles such as Chevrolet Tahoe, GMC Yukon, and Chevrolet Silverado 1500 applications that match the listed fitment.

Key Features

• Part number: SS3119
• Seal type: metal, spring, auxiliary lip
• Sealing material: Viton
• Bore diameter: 2.763 in / 70.18 mm
• Seal outside diameter: 2.767 in / 70.282 mm
• Seal width: 2.125 in / 53.975 mm
• Rear position application
• Fits a wide range of GM rear axle applications from 1997-2015

Detailed Description

FAG SS3119 is designed for rear differential pinion service where accurate sealing is critical to axle performance. The Viton sealing material is selected for demanding driveline environments, while the spring-loaded, auxiliary-lip construction helps maintain contact at the sealing surface. This seal is used across many Chevrolet, GMC, Cadillac, Buick, Hummer, Isuzu, Saab, and related GM-platform vehicles, including Chevrolet Tahoe, GMC Yukon, and Chevrolet Silverado 1500 rear axle applications.

This part cross-references Gates 21285 and National 710506 for the same application. It also aligns with Schaeffler global number 413 3119 100.

Common Problems This Seal Addresses

• Rear differential oil seepage at the pinion area
• Contamination from dirt, dust, and moisture entering the axle housing
• Loss of gear oil around the pinion seal
• Seal wear on high-mileage rear axle assemblies
• Service replacement during differential maintenance or rebuilds

Installation Notes and Tips

Confirm ring gear size, axle code, and rear axle configuration before ordering. This seal is listed for rear applications only, and fitment varies by model, year, and drivetrain setup. Inspect the pinion yoke and sealing surface for wear before installation, and replace any damaged components that could affect seal life.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain FAG quality standards. The seal is built to protect wheel-end and driveline components from contamination while helping retain lubricant over the service life of the bearing assembly.