InMotion WS5723 Engine Crankshaft Seal - Rear

Overview

The InMotion WS5723 is a rear differential pinion seal built for Ford heavy-duty trucks and vans that need a precise sealing surface. It uses PTFE material to help maintain a tight barrier against contaminants and fluid leakage in the differential assembly.

Compatible With Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, Excursion, and related applications, this seal is specified for rear installation and matches the listed shaft and housing dimensions for proper fitment. The WS5723 is also a direct fit for several Ford E-Series and F-Series applications from 1993-2003.

Key Features

• PTFE construction for low-friction sealing performance.
• Designed to maintain a secure seal against debris and moisture.
• Matches the listed inside diameter, outside diameter, and housing bore dimensions.
• Rear differential pinion seal for Ford truck and van applications.
• Fits a wide range of Ford E-Series and Super Duty platforms.

Detailed Description

The WS5723 is engineered as a differential pinion seal for rear axle service, with PTFE material selected for consistent sealing at the pinion interface. Its dimensions include a 4.375-inch inside diameter, 5.179-inch outside diameter, and 5.169-inch housing bore, helping ensure the seal seats correctly in the differential housing. This part number, WS5723, is used across multiple Ford applications including the F-250, F-350, and E-350 Super Duty.

For buyers searching for a Ford F-350 rear differential pinion seal or a Ford E-350 Super Duty rear pinion seal, WS5723 provides a fitment-specific replacement option. It is also listed for the Ford Excursion and other Super Duty chassis applications, making it a practical service part for differential maintenance.

What It Helps Fix

• Differential fluid leaks at the pinion seal area.
• Contamination from dirt, water, and road debris entering the differential.
• Wear caused by a compromised sealing surface.
• Service issues related to an aging rear differential seal.

Installation Notes and Tips

Install only on the rear differential applications listed in the fitment data. Verify the shaft diameter, housing bore, and seal dimensions before installation to confirm proper seating. Clean the sealing surface thoroughly and inspect the pinion area for wear or damage before replacing the seal.

Quality Assurance

InMotion manufactures this seal with precision-focused construction and high-quality materials for dependable differential service. The WS5723 is built to support a secure seal and consistent fit across the listed Ford applications.