FAG SS4212 Manual Transmission Shift Shaft Seal

Manual Transmission Shift Shaft Seal for Classic GM Applications

The FAG SS4212 manual transmission shift shaft seal is built for vehicles that need a precise sealing surface at the transmission shift shaft. With a metal seal type and nitrile sealing material, it is designed to help keep transmission fluid where it belongs while limiting contamination at the shaft opening.

Compatible with a wide range of Chevrolet, GMC, Buick, Oldsmobile, and Pontiac manual transmission applications, this seal is a direct-fit service part for many classic GM drivetrains. The FAG SS4212 is a practical choice when servicing a leaking shift shaft area on vehicles such as the Chevrolet Camaro, Corvette, and GMC K1500.

Key Features

• Part number: SS4212
• Manual transmission shift shaft seal
• Seal type: metal
• Sealing material: nitrile
• Bore diameter: 1.006 in. / 25.552 mm
• Seal outside diameter: 1.01 in. / 25.654 mm
• Seal width: 0.75 in. / 19.05 mm
• Built to meet vehicle manufacturer specifications
• Designed to help block dirt, dust, and moisture at the seal area

Detailed Description

FAG SS4212 is a transmission sealing component engineered for manual shift shaft service. The metal construction and nitrile sealing material are selected for dimensional stability and sealing performance in demanding drivetrain environments. This seal is used across many GM passenger cars and trucks, including Chevrolet, GMC, Buick, Oldsmobile, and Pontiac models with manual transmissions.

This part cross-references Bosch 7411 and Timken 312518 for the same application. It is a strong fitment-based option for classic GM manual transmission repair work, including Chevrolet Camaro, Chevrolet Corvette, and GMC K1500 applications where the shift shaft seal needs replacement.

What It Helps Address

• Transmission fluid seepage at the shift shaft opening
• Contamination from road dirt, dust, and moisture
• Wear-related sealing loss around the manual transmission shaft
• Service issues on older GM manual transmission assemblies
• Leak diagnosis during drivetrain maintenance on Chevrolet, GMC, Buick, Pontiac, and Oldsmobile vehicles

Installation Notes and Tips

Confirm bore diameter, seal outside diameter, and seal width before installation to match the transmission housing. Inspect the shaft surface for scoring or corrosion before fitting the new seal, and clean the sealing bore thoroughly so the metal case seats evenly. Verify the transmission type and application notes for your vehicle, especially on models with Muncie, Saginaw, or Tremec manual transmissions.

• Fits 1963-1974 Chevrolet Corvette, N/A; Muncie Transmission
• Fits 1974-1975 Chevrolet Camaro, N/A; Muncie Transmission
• Fits 1979-1986 GMC K1500, N/A; Muncie, Saginaw, Tremac Transmission
• Fits 1976-1981 Pontiac Grand Prix, N/A
• Fits 1965-1971 Pontiac Bonneville, N/A; Muncie, Saginaw Transmission

Quality Assurance

FAG designs seals using materials selected to meet vehicle manufacturer specifications, with supplier coordination focused on maintaining FAG quality standards. The SS4212 is engineered for sealing performance in demanding wheel-end and drivetrain service environments, with attention to contamination control and grease or fluid retention over the service life of the component.