National 224520 Automatic Transmission Torque Converter Seal

Automatic Transmission Torque Converter Seal

National 224520 is a metric nitrile oil seal used in automatic transmission and drivetrain sealing applications. It is built to match the shaft and housing dimensions called out for specific Audi, Porsche, and Volkswagen fitments, helping maintain a tight seal where fluid retention matters.

• Part number: 224520
• Sealing material: nitrile
• Inside diameter: 1.772 in. / 45.000 mm
• Outside diameter: 2.372 in. / 60.250 mm
• Thickness/width: 0.394 in. / 10.000 mm
• Housing bore: 2.362 in. / 60.000 mm
• Metric unit of dimension for accurate service matching

Fitment and application details

This National torque converter seal is listed for a wide range of Audi, Porsche, and Volkswagen vehicles with specific transmission and differential configurations. Fits 2005-2012 Audi A4 Quattro, with Getrag 466 AWD Transmission; Fits 2008-2012 Audi R8, with Getrag 466 AWD Transmission; Fits 2005-2012 Audi S4, with Getrag 466 AWD Transmission; Fits 2008-2012 Audi S5, with Getrag 466 AWD Transmission; Fits 2005-2012 Porsche Boxster, with Getrag 466 Transmission; Fits 2006-2012 Porsche Cayman, with Getrag 466 Transmission. This part cross-references Beck/Arnley 052-3891 and Centric Parts 417.10000 for the same application.

National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on dimensional accuracy and material selection. The nitrile sealing material is suited to transmission sealing service, while the metric sizing helps confirm the correct match for vehicles such as Audi A4 Quattro, Porsche Cayman, and Volkswagen Passat applications that require the specified shaft and bore dimensions.

Common issues this seal addresses

• Transmission fluid seepage at the torque converter seal area
• Leakage around the shaft interface
• Fluid loss caused by worn or hardened sealing material
• Service replacement during transmission repair or rebuild
• Fitment correction when the original seal no longer holds specification

Installation notes and tips

Verify the transmission code, shaft diameter, housing bore, and seal width before installation. Clean the bore and shaft surfaces thoroughly, and inspect for scoring or wear that could affect sealing performance. Confirm the application against the vehicle’s transmission type, especially on Audi and Porsche models with Getrag, Audi 01E, 01W, 012, 016, 087, 089, 093, or VW 01P/090/098 configurations.

Quality assurance

National is recognized for premium sealing products and ongoing OE-focused engineering support. Part number 224520 is manufactured as a nitrile oil seal for transmission service and is backed by National’s long-standing sealing expertise.