InMotion WS3747 Wheel Seal - Rear

Wheel Seal for Rear Differential Service

The InMotion WS3747 wheel seal is built for rear differential sealing applications that demand a precise fit and dependable contamination control. With nitrile construction and exact dimensional sizing, it helps maintain a secure barrier against moisture, dirt, and debris in compatible Chevrolet and GMC rear axle setups.

Fits 1981-1991 Chevrolet and GMC rear applications with a 9.5-inch ring gear, including Chevrolet C20, K20, P20, R20, V20, G30, R2500 Suburban, and V2500 Suburban, plus GMC C2500, K2500, P2500, R2500, V2500, G3500, R2500 Suburban, and V2500 Suburban. Part number WS3747 is also a direct reference point for rear differential seal service on these vehicles.

Key Features

• Nitrile seal material for durable sealing performance
• Inside diameter: 1.703 in.
• Outside diameter: 3.09 in.
• Housing bore: 3.084 in.
• Width: 0.5 in.
• Designed for rear position applications
• Fits vehicles with a 9.5-inch ring gear where specified

Detailed Description

InMotion WS3747 is a precision-engineered wheel seal for rear driveline sealing service. Its nitrile construction is selected for reliable resistance to contaminants while maintaining a tight seal around the shaft and housing interface. The measured dimensions—1.703-inch inside diameter, 3.09-inch outside diameter, 3.084-inch housing bore, and 0.5-inch width—support accurate installation in the listed Chevrolet and GMC rear axle applications. Use WS3747 when servicing rear differential components on classic C/K, R/V, P-series, and G-series trucks and vans equipped with the 9.5-inch ring gear.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Part Helps Address

• Gear oil leakage at the rear differential seal area
• Contamination from road debris, dust, and moisture
• Wear-related sealing loss during differential service
• Seal replacement needs on high-mileage rear axle assemblies
• Maintenance on Chevrolet C20, K20, P20, R20, V20 and GMC C2500, K2500, P2500, R2500, V2500 platforms

Installation Notes and Tips

Confirm the axle uses a 9.5-inch ring gear before installation. Inspect the shaft surface and housing bore for scoring, corrosion, or debris, and clean all sealing surfaces thoroughly. Verify the seal orientation before pressing it into place, and use proper installation tools to avoid distortion. Part number WS3747 should be matched to the rear position and the listed dimensions for correct service fitment.

Quality Assurance

InMotion manufactures this seal with precision sizing and high-quality materials to support consistent sealing performance in the specified rear differential applications. The design focus is on maintaining a secure barrier against contaminants and helping extend differential service life through proper sealing.