National 2286 Differential Pinion Seal - Rear Outer

National 2286 Differential Pinion Seal

National 2286 is a differential pinion seal built for rear outer applications on a wide range of Chevrolet and GMC trucks, vans, and chassis models. It uses nitrile construction and a Redicoat sealing surface to help maintain a tight seal at the pinion area where gear oil retention is critical.

For Chevrolet C2500, GMC K3500, and other AAM axle applications, this seal is sized for the specified shaft, housing bore, and width dimensions to support proper fitment in the differential assembly.

Key Features

• Part number 2286 differential pinion seal
• Nitrile material for sealing performance in driveline service
• Redicoat sealing surface for improved installation and sealing contact
• Inside diameter: 2.201 in. / 55.910 mm
• Outside diameter: 3.523 in. / 89.480 mm
• Flanged outside diameter: 3.970 in. / 100.838 mm
• Thickness/width: 0.590 in. / 14.990 mm
• Housing bore: 3.519 in. / 89.380 mm
• Series 2000, Type 74 oil seal

Detailed Description

National has supplied sealing solutions for more than 75 years, and this differential pinion seal reflects that focus on dimensional accuracy and dependable sealing design. The 2286 seal is an oil seal used at the pinion area of the differential to help retain lubricant and keep contaminants out of the assembly. Its listed dimensions make it a direct-match service part for many rear outer applications using a 10.5-inch ring gear and AAM axle configurations.

This part cross-references Gates 21955 for the same application. It is a strong fitment match for Chevrolet C2500, GMC C3500, and related rear axle service needs where the original seal dimensions must be matched closely.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the axle housing through a worn seal
• Noise or driveline issues caused by low lubricant level
• Seal wear from age, heat, and mileage
• Service replacement during rear axle maintenance

Installation Notes and Tips

Verify the axle type, ring gear size, and seal dimensions before installation. This seal is listed for rear outer positions on specific Chevrolet and GMC applications, including 1997 models with AAM axle and 10.5-inch ring gear configurations. Clean the housing bore and shaft surface thoroughly, and inspect for scoring or wear that could affect sealing performance.

Fits 1997 Chevrolet C2500, Rear Outer; 1997 Chevrolet C2500 Suburban, Rear Outer; 1997 Chevrolet C3500, Rear Outer; 1997 Chevrolet Express 2500, Rear Outer; 1997 Chevrolet Express 3500, Rear Outer; 1997 Chevrolet K2500, Rear Outer; 1997 Chevrolet K2500 Suburban, Rear Outer; 1997 Chevrolet K3500, Rear Outer; 1997 Chevrolet P30, Rear Outer; 1997 GMC C2500, Rear Outer; 1997 GMC C2500 Suburban, Rear Outer; 1997 GMC C3500, Rear Outer; 1997 GMC K2500, Rear Outer; 1997 GMC K2500 Suburban, Rear Outer; 1997 GMC K3500, Rear Outer; 1997 GMC P3500, Rear Outer; 1997 GMC Savana 2500, Rear Outer; 1997 GMC Savana 3500, Rear Outer; 1995-1996 Chevrolet C2500, Rear Outer; 1995-1996 Chevrolet C2500 Suburban, Rear Outer; 1995-1996 Chevrolet C3500, Rear Outer; 1996 Chevrolet Express 2500, Rear Outer; 1996 Chevrolet Express 3500, Rear Outer; 1995-1996 Chevrolet G30, Rear Outer; 1995-1996 Chevrolet K2500, Rear Outer; 1995-1996 Chevrolet K2500 Suburban, Rear Outer; 1995-1996 Chevrolet K3500, Rear Outer; 1995-1996 Chevrolet P30, Rear Outer; 1995-1996 GMC C2500, Rear Outer; 1995-1996 GMC C2500 Suburban, Rear Outer; 1995-1996 GMC C3500, Rear Outer; 1995-1996 GMC G3500, Rear Outer; 1995-1996 GMC K2500, Rear Outer; 1995-1996 GMC K2500 Suburban, Rear Outer; 1995-1996 GMC K3500, Rear Outer; 1995-1996 GMC P3500, Rear Outer; 1996 GMC Savana 2500, Rear Outer; 1996 GMC Savana 3500, Rear Outer; 1988-1994 Chevrolet C2500, Rear Outer; 1992-1994 Chevrolet C2500 Suburban, Rear Outer; 1988-1994 Chevrolet C3500, Rear Outer; 1991-1994 Chevrolet G30, Rear Outer; 1988-1994 Chevrolet K2500, Rear Outer; 1992-1994 Chevrolet K2500 Suburban, Rear Outer; 1988-1994 Chevrolet K3500, Rear Outer; 1975-1994 Chevrolet P30, Rear Outer; 1988-1994 GMC C2500, Rear Outer; 1979-1986 GMC C2500, Rear Outer; 1992-1994 GMC C2500 Suburban, Rear Outer; 1979-1986 GMC C2500 Suburban, Rear Outer; 1988-1994 GMC C3500, Rear Outer; 1979-1986 GMC C3500, Rear Outer; 1991-1994 GMC G3500, Rear Outer; 1988-1994 GMC K2500, Rear Outer; 1979-1984 GMC K2500, Rear Outer; 1992-1994 GMC K2500 Suburban, Rear Outer; 1979-1986 GMC K2500 Suburban, Rear Outer; 1988-1994 GMC K3500, Rear Outer; 1979-1986 GMC K3500, Rear Outer; 1979-1994 GMC P3500, Rear Outer; 1989-1991 Chevrolet R2500 Suburban, Rear Outer; 1989-1991 Chevrolet R3500, Rear Outer; 1989-1991 Chevrolet V2500 Suburban, Rear Outer; 1989-1991 Chevrolet V3500, Rear Outer; 1987-1991 GMC R2500 Suburban, Rear Outer; 1987-1991 GMC R3500, Rear Outer; 1987-1991 GMC V2500 Suburban, Rear Outer; 1987-1991 GMC V3500, Rear Outer; 1989 Chevrolet R2500, Rear Outer; 1987-1989 GMC R2500, Rear Outer; 1987-1988 Chevrolet R20, Rear Outer; 1987-1988 Chevrolet R20 Suburban, Rear Outer; 1987-1988 Chevrolet R30, Rear Outer; 1987-1988 Chevrolet V20 Suburban, Rear Outer; 1987-1988 Chevrolet V30, Rear Outer; 1987 Chevrolet V20, Rear Outer; 1987 GMC V2500, Rear Outer; 1975-1986 Chevrolet C20, Rear Outer; 1973-1986 Chevrolet C20 Suburban, Rear Outer; 1976-1986 Chevrolet C30, Rear Outer; 1977-1986 Chevrolet K30, Rear Outer; 1975-1986 Chevrolet P20, Rear Outer; 1979-1986 GMC P2500, Rear Outer; 1975-1984 Chevrolet K20, Rear Outer; 1973-1984 Chevrolet K20 Suburban, Rear Outer.

Quality Assurance

National is recognized for premium sealing solutions and ongoing product development for modern and legacy vehicles. Part number 2286 is built to the listed dimensional specifications for differential service applications.