FAG SS3845 Differential Pinion Seal - Rear or Rear Outer

Reliable Differential Pinion Seal for Accurate Fitment

The FAG SS3845 differential pinion seal is engineered to provide precise sealing performance for driveline and axle applications. Designed with durable polyacrylate sealing material and a metal spring auxiliary lip, this seal ensures effective protection against leaks and contamination in compatible vehicle models.

• Seal Type: Metal construction with spring, auxiliary lip, and inner shell for enhanced durability
• Sealing Material: High-quality polyacrylate for reliable resistance to wear and fluids
• Bore Diameter: 3.876 inches (98.45 mm) for accurate shaft fitment
• Seal Outside Diameter: 3.881 inches (98.577 mm) ensuring proper housing fit
• Seal Width: 11.913 mm (2.5 mm) for optimal sealing surface contact

Technical Details and Material Specifications

The FAG SS3845 differential pinion seal features a metal outer shell combined with a spring-loaded auxiliary lip that maintains consistent pressure against the shaft. The polyacrylate sealing material offers excellent resistance to heat, oil, and other automotive fluids, making it suitable for demanding driveline environments. With precise bore and outside diameters, this seal fits securely to prevent leaks and maintain differential integrity.

Applications and Common Issues Addressed

• Prevents differential oil leaks that can lead to driveline damage
• Protects against contamination from dirt and moisture entering the differential
• Reduces wear on pinion bearings by maintaining proper lubrication
• Helps maintain optimal differential performance and vehicle handling
• Addresses seal failure symptoms such as noise, vibration, or fluid loss

Installation Notes and Tips

When installing the FAG SS3845 differential pinion seal, ensure the shaft and housing surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the sealing lip. Verify the correct orientation of the auxiliary lip to face the lubricant side. Proper installation helps extend seal life and maintain driveline reliability.

Quality Assurance and Warranty Information

FAG manufactures the SS3845 differential pinion seal to meet stringent quality standards for automotive sealing components. The use of premium materials and precise engineering supports consistent performance in various vehicle applications. Warranty coverage details should be confirmed with the original equipment provider or distributor.