FAG SS2556 Differential Pinion Seal - Front

Overview of FAG Differential Pinion Seal SS2556

The FAG SS2556 differential pinion seal is engineered for reliable sealing performance in driveline systems. Designed specifically for select Buick, Chevrolet, GMC, and Oldsmobile models, this seal ensures proper protection against leaks and contamination.

• Seal Type: Metal with spring and auxiliary lip for enhanced sealing
• Sealing Material: Durable Viton compound for resistance to heat and chemicals
• Bore Diameter: 2.656 inches (67.462 mm)
• Seal Outside Diameter: 2.664 inches (67.666 mm)
• Seal Width: 1.521 inches (11.1 mm)

Technical Description and Specifications

The FAG SS2556 differential pinion seal features a metal construction with an integrated spring and auxiliary lip, providing a secure and consistent seal around the pinion shaft. The use of Viton as the sealing material offers superior resistance to high temperatures, oils, and other automotive fluids, making it suitable for demanding driveline environments. With precise bore and outside diameters of approximately 2.656 inches and 2.664 inches respectively, this seal fits tightly to prevent fluid leakage. The seal width of 1.521 inches ensures adequate surface contact for effective sealing.

Compatible Vehicles and Applications

This differential pinion seal is compatible with various models from Buick, Chevrolet, GMC, and Oldsmobile, including:

• Buick Rainier
• Chevrolet Trailblazer, Trailblazer EXT
• GMC Envoy, Envoy XL, Envoy XUV
• Oldsmobile Bravada

Use the FAG SS2556 seal when servicing the differential pinion shaft on these vehicles to maintain driveline integrity and prevent leaks.

Common Issues Addressed by FAG SS2556

• Prevents differential fluid leaks around the pinion shaft
• Reduces contamination ingress into the differential housing
• Minimizes wear caused by improper sealing or degraded seals
• Maintains optimal lubrication within the differential assembly
• Helps avoid costly driveline repairs due to seal failure

Installation Notes and Tips

• Ensure the differential housing and pinion shaft surfaces are clean and free of debris before installation
• Use appropriate tools to press the seal evenly without distortion
• Verify correct orientation of the seal, with the spring lip facing the fluid side
• Check for proper fitment dimensions to avoid leaks or premature wear
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

FAG manufactures the SS2556 differential pinion seal to meet stringent quality standards for durability and performance. The use of Viton sealing material and metal spring design ensures long service life under typical operating conditions. While specific warranty details may vary, FAG products generally come with manufacturer-backed quality assurance to support reliability in automotive driveline applications.