InMotion WS4250 Wheel Seal - Front Inner or Rear Inner

Wheel Seal for Differential Pinion Service

InMotion WS4250 is a precision wheel seal built to help keep contaminants out of the differential pinion area while maintaining a secure sealing surface. With nitrile sealing material and a durable steel case, it is built for front inner and rear inner applications across a wide range of Ford, Dodge, Mazda, and Plymouth vehicles.

Use this seal when you need a direct-fit replacement for service work on vehicles such as the Ford F-150, Ford Bronco, and Dodge Ram 3500 Van. The WS4250 is sized for a 2.500-inch shaft diameter and a 3.303-inch housing bore, with a 0.465-inch width for proper sealing geometry.

Key Features

• Part number: WS4250
• Nitrile sealing surface material for dependable fluid control
• SAE 1008 spring material for consistent sealing tension
• SAE 1070 seal case material for structural support
• Inside diameter: 2.484 in / 63.1 mm
• Outside diameter: 3.308 in / 84 mm
• Housing bore: 3.303 in / 83.9 mm
• Width: 0.465 in / 11.8 mm

Detailed Description

InMotion WS4250 is engineered to create a tight barrier at the differential pinion seal location, helping protect sensitive internal components from moisture, road debris, and contamination. Its measured dimensions and nitrile sealing lip are suited for applications that require accurate fitment and reliable sealing performance. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With applications include Fits 1999-2003 Dodge Ram 3500 Van, rear inner with Spicer 60 axle; Fits 1990-1997 Ford Ranger, front inner; Fits 1994-1997 Mazda B3000, front inner; Fits 1989-1994 Ford F-150, front inner; and Fits 1970-1986 Ford Bronco, front inner. The WS4250 also covers additional front inner and rear inner service positions across select Ford, Dodge, Mazda, and Plymouth driveline setups.

What It Helps Address

• Gear oil seepage at the differential pinion seal area
• Contamination entering the differential housing
• Seal wear from age, heat, and road exposure
• Loss of sealing tension around the pinion shaft
• Service issues on front inner or rear inner axle applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation. Confirm axle configuration and position, since this part is listed for both front inner and rear inner applications depending on vehicle and axle type. Inspect the pinion surface for wear or scoring before installing the new seal, and ensure the sealing lip is seated evenly to maintain proper contact.

Quality Assurance

InMotion manufactures this seal with a nitrile sealing surface, SAE 1008 spring material, and SAE 1070 seal case material to support consistent fit and sealing integrity in driveline service.