SKF 4912 Manual Transmission Shift Shaft Seal

SKF 4912 Shift Shaft Seal Overview

SKF 4912 is a manual transmission shift shaft seal built for applications that need a precise seal at the shift shaft. With a nitrile sealing surface and compact dimensions, it is designed to help retain transmission fluid while keeping dirt and moisture out of the transaxle or transmission case.

SKF’s seal engineering dates back to the first integrated shaft seal, and this part reflects that focus on material selection and fit-specific design. It is a direct replacement choice for a wide range of GM, Cadillac, Buick, Pontiac, Saturn, GMC, Chevrolet, and Hummer applications, including Chevrolet Silverado, GMC Sierra, and Cadillac CTS models.

Key Features

• Part number: 4912
• Manual transmission shift shaft seal for transmission sealing applications
• Nitrile sealing surface for dependable fluid control
• Outside diameter: 0.754 in.
• Shaft diameter: 0.500 in.
• Width: 0.125 in.
• Engineered by SKF for application-specific sealing performance

Product Details

SKF 4912 is designed around the dimensions and sealing requirements of the shift shaft opening, helping maintain proper transmission fluid containment at the shaft interface. The seal’s nitrile sealing surface is selected for automotive transmission environments where resistance to fluid exposure and consistent contact are important. This part cross-references Four Seasons 12010 for the same application.

Compatible vehicle coverage includes Fits 2008-2013 Cadillac CTS, N/A; Fits 2007-2013 Chevrolet Avalanche, N/A; Fits 1999-2013 Chevrolet Silverado 1500, N/A; Fits 1999-2013 GMC Sierra 1500, N/A; and Fits 2004-2012 Chevrolet Colorado, N/A. It also covers many additional GM platforms such as Chevrolet Corvette, Express, Tahoe, Trailblazer, and GMC Yukon applications across the listed model years.

Common Problems This Seal Addresses

• Transmission fluid seepage at the shift shaft
• Contamination entering the transmission through a worn shaft seal
• Wet or oily residue around the shift shaft area
• Seal wear caused by age, heat, and fluid exposure
• Loss of sealing integrity during transmission service or rebuild work

Installation Notes and Tips

Confirm shaft diameter, outside diameter, and seal width before installation. Inspect the shift shaft surface for scoring, corrosion, or wear that could affect sealing performance. Clean the bore and surrounding area thoroughly, and install the seal squarely to avoid distortion of the nitrile sealing lip. Verify the transmission type and vehicle notes, including applications marked without parking brake where listed in the fitment data.

Quality Assurance

SKF has a long history in shaft seal design and manufactures seals to specific application requirements using premium materials and controlled production standards. The brand’s sealing expertise is backed by more than a century of use in automotive applications, with a focus on keeping lubricants in and contaminants out.