InMotion WS4528N Manual Transmission Output Shaft Seal

Manual Transmission Output Shaft Seal for NP3500/3550

The InMotion WS4528N manual transmission output shaft seal is built to help maintain a clean, sealed transmission housing by keeping contaminants out and fluid in. With a polyacrylate sealing material and precise dimensions, it is a direct-fit service part for a wide range of Chevrolet, GMC, Dodge, and Jeep applications using New Process and Getrag transmissions.

For drivers servicing a Chevrolet Silverado 1500 Classic, GMC Sierra 1500, or Dodge Ram 1500, the WS4528N provides the dimensional accuracy needed for a dependable seal at the output shaft area.

Key Features

• Polyacrylate construction for sealing durability
• Inside diameter: 1.89 in.
• Outside diameter: 2.565 in.
• Housing bore: 2.559 in.
• Thickness: 0.965 in.
• Designed for manual transmission output shaft sealing
• Part number: WS4528N

Detailed Description

InMotion WS4528N is a manual transmission output shaft seal engineered to create a tight barrier at the transmission housing. Its polyacrylate material is selected for sealing performance, while the listed shaft diameter, housing bore, and overall dimensions support accurate fitment in applications calling for New Process 3500, New Process 3550, or Getrag 290 transmissions. This seal is used in service work where the output shaft area needs protection from moisture, road debris, and fluid leakage. The part number WS4528N is also a useful reference when matching replacement seals for Chevrolet S10, GMC Jimmy, and Dodge Ram 1500 drivetrain repairs.

This part cross-references common OE-style service applications for the same transmission families.

What It Is Used For

• Stopping transmission fluid seepage at the output shaft
• Blocking dirt, moisture, and road contamination from entering the transmission
• Restoring sealing performance after wear on the original seal
• Addressing leaks found during manual transmission service
• Supporting drivetrain maintenance on high-mileage Chevrolet, GMC, Dodge, and Jeep vehicles

Installation Notes and Tips

Confirm transmission type before ordering, since fitment varies by New Process 3500, New Process 3550, and Getrag 290 applications. Verify the housing bore and shaft diameter against the listed dimensions before installation. Inspect the output shaft surface for wear, scoring, or contamination, and clean the sealing area thoroughly before fitting the new seal. For 1989 Chevrolet and GMC applications, note the 2.565 in. outside diameter requirement shown in the fitment data.

Quality Assurance

InMotion manufactures this seal with precision-focused dimensions and sealing material selected for transmission service. The WS4528N is specified for direct replacement use in confirmed applications, including Chevrolet Silverado 1500, GMC Sierra 1500, and Dodge Ram 1500 models with the listed transmission configurations.