InMotion WS8610 Differential Pinion Seal - Rear Outer

Differential Pinion Seal for Rear Outer Applications

The InMotion WS8610 differential pinion seal is built to help maintain a clean, tight seal at the differential pinion area. With nitrile sealing material and a precision case design, it helps keep contaminants out and gear oil in for dependable driveline operation.

Use this seal for rear outer applications on a wide range of Chevrolet, GMC, Pontiac, Buick, Cadillac, Honda, and Isuzu vehicles with the specified axle and ring gear configurations.

Key Features

• Part number: WS8610
• Sealing material: Nitrile
• Seal case material: SAE 1070
• Spring material: SAE 1008
• Inside diameter: 1.468 in. / 37.3 mm
• Outside diameter: 2.661 in. / 67.6 mm
• Thickness: 0.424 in. / 10.8 mm
• Shaft diameter: 1.521 in. / 38.6 mm
• Housing bore: 2.656 in. / 67.5 mm
• External marking: 13005

Detailed Description

InMotion WS8610 is a differential pinion seal engineered for a precise fit in rear outer driveline applications. The nitrile sealing lip is selected for oil resistance, while the SAE 1070 seal case and SAE 1008 spring support stable sealing performance under normal driveline movement. This seal is sized for a 2.661-inch outside diameter and 2.656-inch housing bore, making dimensional accuracy important during replacement.

For vehicles such as the Chevrolet S10, GMC Sonoma, Pontiac Firebird, and Chevrolet Camaro, the correct rear outer pinion seal helps preserve differential fluid level and reduce contamination at the pinion entry point. WS8610 is a direct service part for applications that call for the listed dimensions and axle notes.

What This Part Helps Address

• Differential gear oil seepage at the pinion seal area
• Contamination entering the differential housing
• Moisture intrusion around the pinion shaft opening
• Wear related to a hardened or damaged original seal
• Fluid loss that can affect differential lubrication

Installation Notes and Fitment

Fits 2001 Chevrolet Astro, Rear Outer, 2.66in Outside Diameter.

Fits 2001 Chevrolet Blazer, Rear Outer, 2.66in Outside Diameter.

Fits 2001 Chevrolet Camaro, Rear Outer, 2.66in Outside Diameter.

Fits 2001 Chevrolet S10, Rear Outer, 2.66in Outside Diameter.

Fits 2001 GMC Jimmy, Rear Outer, 2.66in Outside Diameter.

Fits 2001 GMC Safari, Rear Outer, 2.66in Outside Diameter.

Fits 2001 GMC Sonoma, Rear Outer, 2.66in Outside Diameter.

Fits 2001 Oldsmobile Bravada, Rear Outer, 2.66in Outside Diameter.

Fits 2001 Pontiac Firebird, Rear Outer, 2.66in Outside Diameter.

• Fits 1995-2000 Chevrolet Astro, Rear Outer, with AAM Axle.
• Fits 1995-2000 Chevrolet Blazer, Rear Outer, with AAM Axle.
• Fits 1995-2000 Chevrolet Camaro, Rear Outer, with AAM Axle.
• Fits 1995-2000 Chevrolet S10, Rear Outer, with AAM Axle.
• Fits 1995-2000 GMC Jimmy, Rear Outer, with AAM Axle.
• Fits 1995-2000 GMC Safari, Rear Outer, with AAM Axle.
• Fits 1995-2000 GMC Sonoma, Rear Outer, with AAM Axle.
• Fits 1996-2000 Isuzu Hombre, Rear Outer, with AAM Axle.
• Fits 1996-2000 Oldsmobile Bravada, Rear Outer, with AAM Axle.
• Fits 1995-2000 Pontiac Firebird, Rear Outer, with AAM Axle.
• Fits 1995-1999 Honda Passport, Rear Outer, with AAM Axle.
• Fits 1995-1999 Isuzu Rodeo, Rear Outer, with AAM Axle.
• Fits 1995-1996 Chevrolet Impala, Rear Outer, with AAM Axle.
• Fits 1990-1994 Chevrolet Astro, Rear Outer, with GMC Axle.
• Fits 1985-1994 Chevrolet Camaro, Rear Outer, with GMC Axle.
• Fits 1994 Chevrolet Impala, Rear Outer, with GMC Axle.
• Fits 1994 Chevrolet S10, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1992 Chevrolet S10, Rear Outer, with 7.5in Ring Gear.
• Fits 1993-1994 Chevrolet S10 Blazer, Rear Outer, with 7.5in Ring Gear.
• Fits 1983-1989 Chevrolet S10 Blazer, Rear Outer, with 7.5in Ring Gear.
• Fits 1992-1994 GMC Jimmy, Rear Outer, with GMC Axle.
• Fits 1990-1994 GMC Safari, Rear Outer, with GMC Axle.
• Fits 1994 GMC Sonoma, Rear Outer, with 7.5in Ring Gear.
• Fits 1994 Honda Passport, Rear Outer, with 7.5in Ring Gear.
• Fits 1991-1994 Isuzu Rodeo, Rear Outer, with 7.5in Ring Gear.
• Fits 1991-1994 Oldsmobile Bravada, Rear Outer, with GMC Axle.
• Fits 1985-1994 Pontiac Firebird, Rear Outer, with GMC Axle.
• Fits 1982-1993 Chevrolet Caprice, Rear Outer, with 7.5in Ring Gear.
• Fits 1991-1993 Chevrolet Commercial Chassis, Rear Outer, with 7.5in Ring Gear.
• Fits 1993 Chevrolet S10, Rear Outer, with GMC Axle.
• Fits 1991-1993 GMC Sonoma, Rear Outer, with GMC Axle.
• Fits 1990-1992 Chevrolet S10 Blazer, Rear Outer, with GMC Axle.
• Fits 1990-1991 GMC S15 Jimmy, Rear Outer, with 7.5in Ring Gear.
• Fits 1983-1988 GMC S15 Jimmy, Rear Outer, with 7.5in Ring Gear.
• Fits 1988-1990 Cadillac Brougham, Rear Outer, with GMC Axle.
• Fits 1990 GMC S15, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1988 GMC S15, Rear Outer, with 7.5in Ring Gear.
• Fits 1985-1989 Chevrolet Astro, Rear Outer, with 7.5in Ring Gear.
• Fits 1989 GMC S15, Rear Outer, with GMC Axle.
• Fits 1989 GMC S15 Jimmy, Rear Outer, with GMC Axle.
• Fits 1985-1989 GMC Safari, Rear Outer, with 7.5in Ring Gear.
• Fits 1987-1988 Chevrolet Monte Carlo, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1985 Chevrolet Monte Carlo, Rear Outer, with 7.5in Ring Gear.
• Fits 1987-1988 Oldsmobile Cutlass Supreme, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1985 Oldsmobile Cutlass Supreme, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1987 Buick LeSabre, Rear Outer, with 7.5in Ring Gear.
• Fits 1987 Buick Regal, Rear Outer, with GMC Axle.
• Fits 1987 Cadillac Brougham, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1987 Cadillac Commercial Chassis, Rear Outer, with 7.5in Ring Gear.
• Fits 1987 Chevrolet El Camino, Rear Outer, with GMC Axle.
• Fits 1987 Oldsmobile Cutlass, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1981 Oldsmobile Cutlass, Rear Outer, with 7.5in Ring Gear.
• Fits 1986-1987 Oldsmobile Cutlass Salon, Rear Outer, with GMC Axle.
• Fits 1987 Pontiac Grand Prix, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1985 Pontiac Grand Prix, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1986 Buick Regal, Rear Outer, with 7.5in Ring Gear.
• Fits 1986 Cadillac Fleetwood, Rear Outer, with GMC Axle.
• Fits 1978-1986 Chevrolet El Camino, Rear Outer, with 7.5in Ring Gear.
• Fits 1986 Chevrolet Monte Carlo, Rear Outer, with GMC Axle.
• Fits 1985-1986 Oldsmobile Cutlass, Rear Outer, with GMC Axle.
• Fits 1986 Oldsmobile Cutlass Supreme, Rear Outer, with GMC Axle.
• Fits 1976-1986 Pontiac Bonneville, Rear Outer, with 7.5in Ring Gear.
• Fits 1986 Pontiac Grand Prix, Rear Outer, with GMC Axle.
• Fits 1976-1986 Pontiac Parisienne, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1985 Cadillac Fleetwood, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1985 Chevrolet Impala, Rear Outer, with 7.5in Ring Gear.
• Fits 1985 Oldsmobile Cutlass Salon, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1980 Oldsmobile Cutlass Salon, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1985 Oldsmobile Delta 88, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1984 Cadillac DeVille, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1984 Chevrolet Camaro, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1984 Oldsmobile 98, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1984 Oldsmobile Cutlass Calais, Rear Outer, with 7.5in Ring Gear.
• Fits 1982-1984 Pontiac Firebird, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1983 Chevrolet Malibu, Rear Outer, with 7.5in Ring Gear.
• Fits 1980-1983 Oldsmobile Cutlass Cruiser, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1983 Pontiac Grand LeMans, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1981 Buick Century, Rear Outer, with 7.5in Ring Gear.
• Fits 1981 Chevrolet Bel Air, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1981 Pontiac Catalina, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1981 Pontiac Laurentian, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1981 Pontiac LeMans, Rear Outer, with 7.5in Ring Gear.
• Fits 1975-1980 Buick Skyhawk, Rear Outer, with 7.5in Ring Gear.
• Fits 1975-1980 Chevrolet Monza, Rear Outer, with 7.5in Ring Gear.
• Fits 1975-1980 Oldsmobile Starfire, Rear Outer, with 7.5in Ring Gear.
• Fits 1978-1980 Pontiac Grand Am, Rear Outer, with 7.5in Ring Gear.
• Fits 1976-1980 Pontiac Sunbird, Rear Outer, with 7.5in Ring Gear.
• Fits 1975-1979 Buick Skylark, Rear Outer, with 7.5in Ring Gear.
• Fits 1976-1979 Oldsmobile Omega, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1979 Pontiac Phoenix, Rear Outer, with 7.5in Ring Gear.
• Fits 1977-1978 Buick Riviera, Rear Outer, with 7.5in Ring Gear.
• Fits 1972-1975 Chevrolet Nova, Rear Outer, with 7.5in Ring Gear.

Confirm axle type, ring gear size, and housing bore before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Built by InMotion for differential sealing service, WS8610 uses specified material and dimensional standards to support accurate replacement in the listed applications.