InMotion WS8974S Wheel Seal - Front Inner

Front Inner Differential Pinion Seal for Heavy-Duty Applications

The InMotion WS8974S is a front inner seal engineered to help keep differential pinion components protected from road debris, moisture, and lubricant loss. Built with nitrile material and sized for a 2.12 in inside diameter, 3.01 in outside diameter, and 0.495 in width, it is a precise sealing solution for select Chevrolet and GMC trucks and vans.

Use the WS8974S when servicing the front inner position on compatible Chevrolet C20, C30, G20, G30, P20, P30, R20, R30, and GMC C2500, C3500, G2500, G3500, P2500, P3500, R2500, and R3500 applications. This part number is also a direct search match for WS8974S in driveline and axle seal replacement catalogs.

Key Features

• Nitrile construction for sealing performance in driveline service
• Designed for the front inner position
• Inside diameter: 2.12 in / 53.8 mm
• Outside diameter: 3.01 in / 76.3 mm
• Width: 0.495 in / 12.6 mm
• Shaft diameter: 2.18 in / 55.4 mm
• Housing bore: 3.00 in / 76.2 mm
• External markings: 2.18 x 3.00 x 0.495

Detailed Description

InMotion WS8974S is a wheel seal used in driveline and axle sealing systems where a stable barrier is needed around the differential pinion area. The nitrile sealing material is selected for its ability to maintain contact and help reduce contamination from dirt and moisture while supporting lubricant retention. With its specified dimensions, this seal is suited to service work where accurate fitment matters, including front inner seal replacement on older Chevrolet and GMC heavy-duty platforms.

Compatible With: 1967-1991 Chevrolet and GMC front inner applications listed below, including Chevrolet C20, C30, G20, G30, P20, P30, R20, R30 and GMC C2500, C3500, G2500, G3500, P2500, P3500, R2500, R3500. Fits 1988-1991 Chevrolet C2500, front inner, with Heavy Duty Brakes; Fits 1988-1991 Chevrolet C3500, front inner; Fits 1983-1991 Chevrolet G20, front inner, with Heavy Duty Brakes; Fits 1975-1978 Chevrolet G20, front inner, with Heavy Duty Brakes; Fits 1975-1991 Chevrolet G30, front inner; Fits 1989-1991 Chevrolet R2500 Suburban, front inner; Fits 1989-1991 Chevrolet R3500, front inner; Fits 1988-1991 GMC C2500, front inner, with Heavy Duty Brakes; Fits 1988-1991 GMC C3500, front inner; Fits 1979-1986 GMC C3500, front inner; Fits 1983-1991 GMC G2500, front inner, with Heavy Duty Brakes; Fits 1979-1991 GMC G3500, front inner; Fits 1987-1991 GMC R2500 Suburban, front inner; Fits 1987-1991 GMC R3500, front inner; Fits 1985-1990 Chevrolet P30, front inner, except I-Beam Axle; Fits 1985-1990 GMC P3500, front inner, except I-Beam Axle; Fits 1975-1989 Chevrolet P20, front inner; Fits 1989 Chevrolet R2500, front inner; Fits 1979-1989 GMC P2500, front inner; Fits 1987-1989 GMC R2500, front inner; Fits 1987-1988 Chevrolet R20, front inner; Fits 1987-1988 Chevrolet R20 Suburban, front inner; Fits 1987-1988 Chevrolet R30, front inner; Fits 1975-1986 Chevrolet C20, front inner; Fits 1967-1986 Chevrolet C20 Suburban, front inner; Fits 1975-1986 Chevrolet C30, front inner; Fits 1979-1986 GMC C2500, front inner; Fits 1979-1986 GMC C2500 Suburban, front inner; Fits 1975-1984 Chevrolet P30, front inner; Fits 1979-1984 GMC P3500, front inner; Fits 1975-1978 GMC G35, front inner; Fits 1970-1974 GMC G35/G3500 Van, front inner; Fits 1971 GMC G25/G2500 Van, front inner, with Front Drum Brakes; Fits 1969-1970 Chevrolet C10 Suburban, front inner, with Heavy Duty Brakes; Fits 1967-1970 GMC G25/G2500 Van, front inner, with Drum Brakes.

Common Service Uses

• Replacing a leaking front inner differential pinion seal
• Addressing gear oil seepage around the axle seal area
• Restoring sealing integrity after contamination from dirt or moisture
• Servicing worn seals during differential maintenance
• Supporting driveline repair on Chevrolet and GMC heavy-duty trucks and vans

Installation Notes and Tips

Confirm the shaft diameter, housing bore, and seal width before installation to ensure the WS8974S matches the axle assembly. Inspect the sealing surface for wear, scoring, or corrosion, and clean the bore thoroughly before pressing the seal into place. Verify vehicle-specific notes such as Heavy Duty Brakes, Front Drum Brakes, or Except I-Beam Axle before ordering.

Quality Assurance

InMotion manufactures this seal with precision-focused dimensions and nitrile material for consistent sealing performance in driveline service. The WS8974S is built to meet the dimensional requirements listed above for the specified Chevrolet and GMC front inner applications.