FAG SS3311 Wheel Seal - Rear or Rear Inner

FAG SS3311 Wheel Seal for Heavy-Duty Rear Axles

FAG SS3311 is a rear wheel seal built for demanding axle applications where contamination control and grease retention matter. It is engineered with Viton sealing material and a multi-lip design to help keep dirt, dust, and moisture out of the wheel end.

Compatible With Ford E-350 Super Duty, Ford F-350 Super Duty, Ford E-250, and select Dodge Ram van and truck applications, this wheel seal is specified for rear inner and rear positions across a wide range of heavy-duty vehicles.

Key Features

• Part number: SS3311
• Wheel seal for rear inner and rear axle positions
• Viton sealing material for demanding service conditions
• Seal type: rubber, spring, auxiliary lip, inner shell
• Built to help block contamination and retain axle grease
• Measures 3.876 in. bore diameter, 3.881 in. outside diameter, and 2.875 in. width
• Cross-reference: SKF 28754

Detailed Description

FAG SS3311 is a precision wheel seal for heavy-duty driveline and axle service. The seal is designed around vehicle-specific requirements and uses a Viton sealing material with a rubber spring, auxiliary lip, and inner shell construction to support consistent sealing at the wheel end. Its job is to protect bearing components from dirt, dust, and moisture while helping prevent grease loss over the life of the bearing.

This seal is used in a broad range of Ford and Dodge rear axle applications, including Ford E-350 Super Duty rear inner, Ford F-350 Super Duty rear, Ford E-250 rear, and Dodge Ram 1500/2500/3500 van and truck rear positions. The FAG SS3311 part number is also referenced by OE-style and aftermarket listings for the same application.

What It Helps Address

• Grease leakage at the wheel end
• Contamination from road dirt, dust, and moisture
• Premature bearing wear caused by failed sealing
• Seal replacement needs on rear axle service jobs
• Fitment-specific sealing requirements on heavy-duty Ford and Dodge applications

Installation Notes and Tips

Verify axle configuration, position, and seal dimensions before installation. This seal is listed for rear inner and rear applications, including vehicles with full floating axles, dual rear wheels, traction control, and flange-specific setups. Confirm bore diameter, outside diameter, and width against the original seal and axle housing before pressing the new seal into place.

For best results, inspect the bearing, spindle, and sealing surface for wear or scoring before assembly. Clean the sealing area thoroughly so the new seal can seat evenly and maintain proper contact.

Quality Assurance

FAG wheel seals are engineered using high-quality materials and built to meet vehicle manufacturer specifications. The design focus is on sealing performance, contamination resistance, and long-term grease retention in demanding wheel-end service.