FAG SS3109 Manual Transmission Seal - Front or Rear

Manual Transmission Seal for Heavy-Duty Applications

FAG SS3109 is a manual transmission seal built for demanding driveline service where contamination control and lubricant retention matter. With a nitrile sealing material and a metal spring design with auxiliary lip, this seal is engineered to help maintain a clean sealing surface in manual transmission and transfer case applications.

Compatible With 1953-1993 Ford, Dodge, Chevrolet, GMC, and Jeep applications listed below, including many rear-position and New Process 205 setups. Part number SS3109 is also cross-referenced to National 473468 for the same application.

Key Features

• FAG manual transmission seal, part number SS3109
• Seal type: metal, spring, auxiliary lip
• Nitrile sealing material for fluid resistance
• Bore diameter: 3.061 in. / 77.749 mm
• Outside diameter: 3.066 in. / 77.876 mm
• Seal width: 2.125 in. / 53.975 mm
• Designed to help keep dirt, dust, and moisture out of the sealed area
• Helps retain grease and lubricant over bearing and seal service life

Detailed Description

FAG SS3109 is specified for a wide range of older truck and utility vehicle driveline applications, including Ford F-250 and F-350, Dodge W-series trucks, Chevrolet K-series models, GMC K-series trucks, and Jeep J10, J20, CJ5, and Wagoneer applications. The seal dimensions and construction are matched to demanding service conditions where proper fit and sealing performance are critical. If you are servicing a manual transmission seal or related drivetrain sealing point, SS3109 provides the dimensional accuracy needed for a proper repair.

This part is commonly referenced in applications using New Process 205 components, and it appears in fitment for rear positions on many trucks such as 1975-1979 Ford F-250, rear; 1988-1993 Dodge Ramcharger, rear; and 1988-1991 Chevrolet V3500, rear. It also fits 1982-1993 Dodge W350, N/A, and 1980-1986 GMC K3500, rear, among many others.

What It Helps Address

• Fluid seepage at the transmission or driveline seal point
• Contamination from dirt, dust, and moisture entering the sealed area
• Grease loss around bearing and seal interfaces
• Wear-related sealing issues on older manual transmission and transfer case service jobs
• Replacement needs for vehicles using the listed OE-style seal dimensions

Installation Notes and Tips

• Verify bore diameter, outside diameter, and seal width before installation.
• Confirm the vehicle position and notes in the fitment list, especially for New Process 205 applications.
• Inspect the shaft or bore surface for scoring, corrosion, or wear before installing the new seal.
• Clean the sealing area thoroughly so the nitrile lip can seat properly.
• Use the exact application notes for your vehicle, as some listings vary by wheelbase or transmission configuration.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. SS3109 is built to the dimensional and material requirements expected for service in demanding drivetrain applications.