InMotion WS370047A Wheel Seal - Rear Inner

Wheel Seal for Ford Rear Inner Applications

The InMotion WS370047A wheel seal is built for rear inner differential service where a tight seal matters. Made from nitrile and sized for precise housing and shaft dimensions, it helps keep contaminants out and fluid in on select Ford heavy-duty rear axle applications.

• Nitrile construction for sealing performance in driveline service
• Outside diameter: 4.761 in.
• Shaft diameter: 3.437 in.
• Housing bore: 4.755 in.
• Width: 0.7 in.
• Part number WS370047A for accurate ordering and replacement matching

Fitment Details

• Fits 1985-1999 Ford F-250, rear inner, with 10.25in Ring Gear
• Fits 1997 Ford F-250 HD, rear inner, with 10.25in Ring Gear
• Fits 1986-1997 Ford F-350, rear inner, Oil Bath Seal Style
• Fits 1985 Ford F-350, rear inner, with 10.25in Ring Gear

How It Works

This differential pinion seal is used to maintain a secure barrier at the rear inner axle area, helping protect sensitive internal components from debris and moisture. On Ford F-250 and Ford F-350 rear axle setups, the WS370047A supports leak control and helps preserve differential service life by maintaining a consistent seal at the pinion area.

Common Problems It Can Address

• Gear oil seepage at the differential pinion area
• Contamination from road debris and moisture
• Seal wear from age and heat cycling
• Reduced sealing performance in rear inner axle service
• Maintenance needs on Ford F-250 and Ford F-350 rear axle assemblies

Installation Notes

Verify axle configuration before installation, including 10.25in ring gear or oil bath seal style where noted. Confirm housing bore, shaft diameter, and seal width against the original part before pressing the seal into place. Clean the sealing surface thoroughly and inspect the pinion area for wear or damage that could affect sealing performance.

Quality Assurance

InMotion manufactures this seal with precision-focused dimensions and nitrile material selection for driveline sealing service. The WS370047A is specified for confirmed Ford rear inner applications, including Ford F-250 and Ford F-350 fitments listed above.