Timken 11S39380 Wheel Seal - Rear Inner

Timken Wheel Seal 11S39380 Overview

Timken 11S39380 is a heavy-duty wheel seal for driveline and axle service, built with an S-Nitrile sealing material and a metal outer diameter for stable hub retention. It is a direct-fit style seal for applications that require a 5.507 in outside diameter, 3.937 in shaft diameter, and 0.937 in width.

For technicians servicing wheel-end leaks on vehicles such as Ford F-150 and Chevrolet Silverado, this seal is built to support consistent sealing performance across a wide temperature range.

Key Features

• Oversized double-walled metal outer diameter helps resist spinning or walking out of the hub bore
• Heavy-duty outer wall supports heat transfer away from the sealing lip
• Three-point nitrile contaminant exclusion system helps protect the sealing lip
• Corrosion-proof spacers with vent holes promote lubricant flow to the sealing lip
• Wide shoulder coverage helps address worn or damaged axle shoulders
• S-Nitrile construction for durable wheel-end sealing

Detailed Description

Timken 11S39380 is a wheel seal engineered for axle and hub sealing service where retention, heat management, and contaminant control matter. The metal outer diameter and double-walled construction help keep the seal seated in the hub bore, while the nitrile lip barrier points help reduce sealing lip damage from road contamination. This part cross-references National 370009A and Four Seasons 39420 for the same application.

With dimensions of 139.89 mm outside diameter, 99.99 mm shaft diameter, 139.72 mm housing bore, and 23.80 mm width, 11S39380 is specified for precise wheel-end service. It is a practical choice for Ford F-150 and Chevrolet Silverado wheel seal replacement work where correct bore fit and sealing integrity are critical.

What It Helps Fix

• Wheel-end lubricant seepage at the hub or axle seal area
• Contamination entering the seal lip from dirt, water, or debris
• Seal movement in the hub bore caused by retention issues
• Heat-related seal wear at the wheel end
• Damage from worn axle shoulders or uneven sealing surfaces

Installation Notes and Tips

Verify hub bore, shaft diameter, and seal width before installation. Inspect the axle shoulder and hub bore for scoring, corrosion, or wear, and clean all sealing surfaces thoroughly before pressing the seal into place. Use proper seal installation tools to avoid distorting the metal outer diameter or damaging the sealing lip. Confirm the seal seats evenly and that lubricant reaches the lip area during assembly.

Quality Assurance

Timken is known for drivetrain and wheel-end sealing components used in professional repair environments. The 11S39380 wheel seal is built with corrosion-resistant spacer features and a multi-lip exclusion design to support long service life in demanding axle applications.