InMotion WS9449 Manual Transmission Output Shaft Seal - Rear

Manual Transmission Output Shaft Seal WS9449

InMotion WS9449 is a nitrile manual transmission output shaft seal built to maintain a tight seal at the shaft and housing bore. With precise dimensions and a durable sealing material, it helps keep contaminants out while controlling fluid loss in a wide range of GM, Cadillac, Buick, Jeep, Jaguar, Rolls-Royce, Bentley, Aston Martin, and Hummer applications.

Use WS9449 when you need a direct-fit seal for service work on vehicles such as Chevrolet Silverado 2500 HD, GMC Sierra 3500, and Chevrolet Blazer rear applications. The part number WS9449 is also a useful reference when matching the correct seal by size and drivetrain configuration.

Key Features

• Nitrile sealing material for dependable fluid control
• Inside diameter: 1.887 in.
• Outside diameter: 2.704 in.
• Housing bore: 2.7 in.
• Thickness/width: 0.582 in.
• Shaft diameter: 1.887 in.
• Fits rear and N/A positions listed in the application data

Detailed Description

WS9449 is engineered around exact dimensional requirements, including a 1.887-inch inside diameter and shaft diameter, a 2.704-inch outside diameter, and a 0.582-inch width. That sizing helps the seal seat properly in the housing bore and maintain consistent contact at the shaft interface. The nitrile construction is selected for sealing performance in transmission service where fluid retention and contamination control are critical.

Fitment coverage includes many long-tail applications such as 1996-2009 Chevrolet Express 2500 under 15,000lb GVW, 2001-2006 Chevrolet Silverado 2500 HD under 15,000lb GVW, 1991-1999 GMC Yukon under 15,000lb GVW, and 1996-1997 Chevrolet Blazer rear with New Process 231C transfer case. It also applies to numerous classic GM trucks and SUVs, plus select Bentley, Rolls-Royce, Jaguar, Aston Martin, and Hummer models. This part number, WS9449, is a practical match point when verifying seal dimensions against the original component.

This part cross-references no listed interchange numbers in the provided data.

Common Problems It Can Address

• Transmission fluid seepage at the output shaft area
• Contamination entering the seal area from road debris or moisture
• Wear-related leakage from an aged or hardened seal
• Improper sealing after transmission or transfer case service
• Noise or drivability concerns caused by low fluid level from leaks

Installation Notes and Tips

• Confirm shaft diameter, housing bore, and width before installation.
• Inspect the shaft surface for grooves, corrosion, or scoring that could affect sealing.
• Clean the bore and surrounding area thoroughly before pressing the seal into place.
• Verify the application notes, especially rear-position and transfer case-specific listings.
• Use the vehicle notes to confirm GVW and transmission configuration where required.

Quality Assurance

InMotion manufactures this seal with precision-focused dimensions and nitrile sealing material for consistent service fitment. For buyers searching WS9449 for Chevrolet Silverado 2500 HD, GMC Sierra 3500, or Chevrolet Blazer rear applications, the listed measurements and vehicle coverage provide the key verification points for selection.