InMotion WS3604 Differential Pinion Seal - Front Outer, Rear or Rear Outer

Differential Pinion Seal for Ford Applications

The InMotion WS3604 differential pinion seal is built to create a secure barrier at the pinion area, helping keep contaminants out and gear oil in. It is a direct-fit sealing solution for a wide range of Ford, Lincoln, Mercury, and Mazda driveline applications, including Ford F-150, Mustang, Explorer, and Ranger models.

Key Features

• Precision-made differential pinion seal for driveline sealing service
• Helps block moisture, dirt, and road debris from entering the differential
• Supports leak control at the pinion area
• Built from high-quality materials for dependable sealing performance
• Compatible with many Ford axle and ring gear configurations
• Part number WS3604 for easy identification and ordering

Detailed Description

InMotion WS3604 is a differential pinion seal designed for vehicles that use Ford axle, Visteon axle, IRS, and select ring gear setups. It is used on front outer and rear outer applications, as well as rear and rear outer positions depending on the vehicle. This seal is a practical replacement when servicing the differential pinion area on trucks, SUVs, and passenger cars that need a tight seal to maintain proper lubrication and protect internal components. This part number, WS3604, is listed across a broad range of Ford F-150, Mustang, Explorer, and Ranger fitments, along with Lincoln, Mercury, and Mazda models.

What It Helps Address

• Gear oil seepage at the differential pinion seal
• Contamination from dirt, water, and debris entering the differential
• Wear-related sealing loss during driveline service
• Maintenance needs on Ford F-150, Mustang, Explorer, and Ranger axle assemblies
• Seal replacement on Lincoln, Mercury, and Mazda rear axle applications

Installation Notes and Tips

Confirm axle type, ring gear size, and position before installation. This seal is listed for front outer, rear outer, and rear locations depending on the application, so match the vehicle exactly to the fitment data. Inspect the pinion surface and surrounding components for wear or damage before installing the new seal. Proper installation and correct lubrication are important for sealing performance.

Quality Assurance

InMotion engineers this seal with precision and uses high-quality materials to support reliable differential sealing and long service life. The WS3604 is specified for confirmed vehicle applications, including Ford F-150, Mustang, Explorer, and Ranger fitments.

Compatible Vehicles

• Fits 2001-2018 Ford Expedition, front outer, with Visteon Axle
• Fits 2001-2018 Ford F-150, front outer, with Visteon Axle
• Fits 2001-2018 Lincoln Navigator, front outer, with Visteon Axle
• Fits 2003-2014 Ford E-150, rear outer, with Visteon Axle
• Fits 2011-2014 Ford Mustang, rear outer, with Visteon Axle
• Fits 2001-2010 Ford Explorer, rear outer, Independent Rear Suspension
• Fits 2001-2010 Ford Ranger, rear outer, with Visteon Axle
• Fits 2001-2010 Mazda B4000, rear outer, with Visteon Axle
• Fits 2001-2010 Mercury Mountaineer, rear outer, Independent Rear Suspension
• Fits 1979-2000 Ford Mustang, rear outer, with Ford Axle
• Fits 1983-2000 Ford Ranger, rear outer, with Ford Axle
• Fits 1979-2000 Mercury Grand Marquis, rear outer, with Ford Axle