Timken 11S34370T Wheel Seal - Rear Inner or Rear Outer

Timken 11S34370T Wheel Seal for Ford Rear Inner Axles

The Timken 11S34370T wheel seal is built for rear inner axle service on select Ford heavy-duty vans and trucks. It combines an S-Nitrile sealing material with a reinforced metal outer diameter to help maintain a secure fit in the hub bore.

Compatible With 1985-1998 Ford E-250 Econoline, rear inner; 1985-1991 Ford E-250 Econoline Club Wagon, rear inner; and select Ford F-250 and F-350 rear inner full-floating axle applications with 10.25 in. or 10.5 in. ring gear configurations.

Key Features

• Oversized double-walled metal outer diameter helps resist spinning or walking out of the hub bore
• Heavy-duty outer wall construction transfers heat away from the sealing lip
• Three-point nitrile contaminant exclusion system helps protect the seal lip across a broad temperature range
• Corrosion-proof spacers with vent holes promote lubricant flow to the sealing lip
• Wide shoulder coverage adds protection on worn or damaged axle shoulders
• S-Nitrile sealing material for durable axle seal service
• Part number 11S34370T for direct identification and ordering

Detailed Description

Timken 11S34370T is a wheel seal for rear inner axle positions on Ford E-250 Econoline, Ford E-250 Econoline Club Wagon, Ford F-250, and Ford F-350 applications listed in the fitment data. The seal measures 4.631 in. outside diameter, 4.625 in. housing bore, 3.125 in. shaft diameter, and 0.605 in. width, with metric equivalents provided in the product data for verification during service work. Its metal outer diameter and wide shoulder coverage support a stable fit in the hub bore and on axle shoulders, while the nitrile lip design helps manage contamination and lubricant retention in demanding driveline conditions. This part number, 11S34370T, is a direct match for the specified rear inner full-floating axle applications.

This part cross-references SKF (e.g., 31323) for the same application.

What It Helps Address

• Gear oil leakage at the rear inner wheel seal
• Contamination entering the hub or axle seal area
• Seal movement in the hub bore from heat or wear
• Reduced sealing performance on worn axle shoulders
• Premature seal lip damage from harsh driveline conditions

Installation Notes and Tips

Verify axle type, ring gear size, and rear inner position before installation. Confirm the housing bore, shaft diameter, and seal width against the removed part and the hub dimensions. Clean the bore and axle shoulder thoroughly, and inspect for scoring, corrosion, or wear that could affect sealing. Use proper seal installation tools to keep the seal square during press-in service.

Quality Assurance

Timken is a recognized name in driveline and axle sealing components, and this wheel seal is built with reinforced construction and contaminant control features for service in demanding Ford rear axle applications.