InMotion WS51322 Wheel Seal - Rear

Wheel Seal for Rear Differential Pinion Service

The InMotion WS51322 wheel seal is built with nitrile material and precise dimensions to help maintain a secure seal at the differential pinion area. It is a direct-fit service part for rear applications on select Ford and Mercury vehicles, including the Ford Mustang and Ford Econoline.

Key Features

• Nitrile construction for dependable sealing performance
• Inside diameter: 1.365 in.
• Outside diameter: 2.085 in.
• Width: 0.435 in.
• Shaft diameter: 1.365 in.
• Housing bore: 2.081 in.
• Rear position application
• Fits vehicles with a 7.25 in ring gear where noted

Detailed Product Information

InMotion WS51322 is engineered to create a tight barrier against moisture, dirt, and other contaminants that can affect differential pinion components. The nitrile sealing material is selected for durability in driveline service, while the listed dimensions help support accurate fitment during replacement work. This part is a practical choice for rear differential maintenance on 1961-1967 Ford Econoline models with a 7.25 in ring gear, 1964-1966 Ford Mustang rear applications, 1969 Ford E-100 Econoline rear applications with a 7.25 in ring gear, and 1963 Mercury Villager rear applications. For buyers searching for InMotion WS51322, Ford Mustang rear wheel seal service, or Ford Econoline differential pinion seal replacement, this part provides a focused fitment match.

This part cross-references no listed interchange numbers for the same application.

What It Helps Address

• Gear oil seepage at the differential pinion seal area
• Contamination entering the rear differential housing
• Wear caused by moisture and road debris exposure
• Seal replacement during driveline service or axle maintenance
• Fitment issues when replacing a worn rear pinion seal

Installation Notes and Tips

Verify shaft diameter, housing bore, and width before installation to confirm the seal matches the axle assembly. Inspect the pinion surface for scoring or wear before installing the new seal, and clean the sealing area thoroughly to help achieve a proper seat. Confirm rear position and ring gear notes for the specific vehicle before ordering. InMotion WS51322 is listed for rear use on the vehicles shown in the fitment data, including Ford Mustang and Ford Econoline applications.

Quality Assurance

Built from nitrile and manufactured to the stated dimensional specifications, this seal is intended for precise driveline service where a reliable barrier is required. The design focus is on maintaining a secure seal around sensitive differential pinion components and supporting long-term service life in the listed applications.