SKF 4911 Automatic Transmission Shift Shaft Seal

SKF 4911 Automatic Transmission Shift Shaft Seal

The SKF 4911 automatic transmission shift shaft seal is built for transmission sealing applications where a precise shaft fit and stable fluid control matter. It uses a nitrile sealing surface and is sized for a 0.500 shaft diameter, with an outside diameter of 0.691 and width of 0.094.

Compatible with a wide range of classic GM and Pontiac applications, including Chevrolet Bel Air, Caprice, Impala, and Nova, as well as Oldsmobile 98 and Pontiac Bonneville, Catalina, and Grand Prix in Roto-Hydramatic transmission applications.

Key Features

• Automatic transmission shift shaft seal for transmission sealing systems
• Nitrile sealing surface for fluid resistance in transmission environments
• 0.500 shaft diameter for the specified shaft size
• 0.691 outside diameter for proper housing fit
• 0.094 width for compact sealing installation
• Fits 1961-1978 Oldsmobile, Chevrolet, and Pontiac applications listed below

Detailed Description

SKF 4911 is an automatic transmission shift shaft seal engineered to help maintain a clean, sealed transmission interface at the shift shaft. SKF has a long history in seal design and manufacturing, and this part reflects that focus with premium materials selected for the demands of transmission service. The nitrile sealing surface is suited to the operating environment where fluid retention and contamination control are important. This part number 4911 is listed for 1965-1975 Chevrolet Bel Air, 1966-1975 Chevrolet Caprice, 1965-1975 Chevrolet Impala, 1969-1975 Chevrolet Nova, 1961-1964 Oldsmobile 98, 1961-1964 Pontiac Bonneville with Roto-Hydramatic Trans., 1961-1964 Pontiac Catalina with Roto-Hydramatic Trans., and 1962-1964 Pontiac Grand Prix with Roto-Hydramatic Trans. This part cross-references 3M8862 and 22X60074A for the same application.

What It Helps Address

• Transmission fluid seepage around the shift shaft
• Contamination entering the transmission through a worn seal area
• Leak-related low fluid condition at the shift shaft interface
• Seal wear from age, heat, and transmission fluid exposure
• Service replacement for classic Chevrolet, Oldsmobile, and Pontiac transmission applications

Installation Notes and Tips

Verify shaft diameter, outside diameter, and seal width before installation to confirm the SKF 4911 matches the transmission housing and shift shaft. Inspect the shaft surface for scoring or wear before installing the new seal, and clean the sealing bore thoroughly so the nitrile lip seats evenly. Confirm the vehicle application and transmission type, especially on Pontiac models listed with Roto-Hydramatic Trans., before assembly.

Quality Assurance

SKF designs and manufactures seals to specific application requirements using materials selected for the operating environment. The brand’s seal engineering background and long production history support consistent fit and sealing performance for transmission service.