FAG SS4504 Automatic Transmission Torque Converter Seal - Front, Front Inner or Rear Outer

Automatic Transmission Seal for Subaru and Ford Applications

FAG SS4504 is an automatic transmission torque converter seal built with nitrile sealing material and a rubber spring design for controlled sealing performance. With a 2.559 in bore diameter, 2.565 in outside diameter, and 1.968 in width, this seal is sized for specific drivetrain applications across Subaru, Ford, Volkswagen, Audi, Dodge, and Mitsubishi vehicles.

Use FAG SS4504 when you need a transmission seal that matches the dimensional requirements of the original application and helps maintain fluid control at the torque converter interface. This part number is also referenced as SS4504 in catalog listings for easy lookup.

Key Features

• Automatic transmission torque converter seal
• Nitrile sealing material for fluid resistance
• Rubber; spring seal type for consistent contact
• Bore diameter: 2.559 in / 64.999 mm
• Seal outside diameter: 2.565 in / 65.151 mm
• Seal width: 1.968 in / 8.001 mm
• Cross-references National 225010 for the same application
• Part number: FAG SS4504

Detailed Description

FAG SS4504 is engineered for transmission sealing applications where correct dimensions and material selection matter. The nitrile sealing element is paired with a rubber spring-style construction to help maintain a secure seal at the torque converter area, where transmission fluid retention and contamination control are critical. This seal is listed for a wide range of vehicles, including Fits 2000-2009 Subaru Outback, Fits 1999-2004 Ford F-250 Super Duty, and Fits 1985-1992 Volkswagen Golf, along with additional Subaru, Ford, Audi, Dodge, Mitsubishi, and Volkswagen applications. The part number SS4504 is commonly used when searching for an OE-style replacement seal with matching size specifications.

What This Part Helps Address

• Transmission fluid leakage at the torque converter seal area
• Contamination from dirt, dust, and moisture entering the sealed area
• Loss of grease or fluid retention at the bearing or seal interface
• Wear-related sealing issues caused by an aged or hardened seal
• Service replacement needs on Subaru Legacy, Ford F-150, and Volkswagen Jetta applications

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation to confirm the seal matches the transmission case and shaft interface. Clean the sealing surface thoroughly and inspect the mating components for scoring, corrosion, or wear that could affect seal life. Confirm vehicle application by year, make, model, and position before ordering; this listing includes N/A, Rear Outer, and Front Inner positions depending on the vehicle. For fitment examples, this seal is listed for Fits 1998-2012 Subaru Forester, Fits 1988-1996 Ford F-150, and Fits 1983-1991 Mitsubishi Montero, Rear Outer.

Quality Assurance

FAG states that its seals are built using high-quality materials and developed to meet vehicle manufacturer specifications. The brand also works with suppliers to align seal construction with FAG quality standards for demanding drivetrain sealing requirements.