FAG SS3278 Differential Pinion Seal - Rear Inner

Reliable Differential Pinion Seal for Driveline Systems

The FAG SS3278 differential pinion seal is engineered to provide durable sealing performance in driveline and axle applications. Designed with precision, this seal helps maintain optimal lubrication and prevents contamination in vehicle differentials.

• Seal Type: Metal construction with spring, auxiliary lip, and inner shell for enhanced sealing
• Sealing Material: Polyacrylate for resistance to heat and wear
• Bore Diameter: 3.543 inches (approx. 90 mm) ensuring a precise fit
• Seal Outside Diameter: 3.548 inches (approx. 90.1 mm) for secure installation
• Seal Width: 11.125 mm (2.75 inches) providing effective sealing depth

Technical Details and Specifications

The FAG SS3278 differential pinion seal features a metal design incorporating a spring and auxiliary lip, supported by an inner shell to maintain consistent pressure against the shaft. The polyacrylate sealing material offers excellent resistance to oil degradation and high temperatures commonly found in driveline environments. With a bore diameter of approximately 3.543 inches and an outside diameter near 3.548 inches, this seal fits tightly to prevent leaks. The 11.125 mm width ensures a robust sealing surface, suitable for various automotive differential applications.

Applications and Problem Solving

• Prevents differential oil leaks that can lead to driveline damage
• Protects against dirt and debris intrusion into the differential assembly
• Maintains proper lubrication levels for smooth differential operation
• Reduces wear on pinion bearings by maintaining a clean environment
• Helps avoid costly repairs related to seal failure in vehicles like Ford F-150 and Chevrolet Silverado

Installation Notes and Tips

When installing the FAG SS3278 differential pinion seal, ensure the bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without distortion. Verify the seal orientation matches the auxiliary lip direction to optimize sealing performance. Proper installation helps extend the service life of the seal and the differential components.

Quality Assurance and Warranty

FAG manufactures the SS3278 differential pinion seal to meet stringent quality standards for driveline components. The use of durable polyacrylate material and metal reinforcement ensures reliable performance under demanding conditions. While specific warranty details are not provided, FAG products typically adhere to industry standards for durability and reliability in automotive applications.