National 711122 Transfer Case Companion Flange Seal

Transfer Case Seal for Volvo AWD Applications

National 711122 is a transfer case companion flange seal built for Haldex PTU transfer case applications that use a full-time 4WD, 1-speed setup. It is specified for a 45.000 mm shaft and a 65.000 mm housing bore, making it a direct-fit sealing solution for many Volvo AWD drivetrains.

Use National 711122 when servicing transfer case oil leaks on Volvo S60, S90, V60, XC60, XC90, XC70, S80, V70, and related Ford and Mercury AWD models. The polyacrylate sealing material and counter-clockwise spiral lip design are engineered for rotating shaft sealing in transfer case service.

Key Features

• Transfer case companion flange seal for AWD driveline service
• Polyacrylate sealing material for oil resistance in transfer case applications
• Counter-clockwise spiral lip design for shaft sealing performance
• Metric dimensions: 65.000 mm housing bore and 45.000 mm shaft
• National 711122 / Series 711100 oil seal construction
• Direct application coverage for Volvo Haldex PTU transfer cases

Detailed Description

National 711122 is an oil seal for transfer case companion flange service, sized for metric housings and shafts commonly found in Haldex PTU transfer case systems. The seal measures 65.200 mm outside diameter, 10.000 mm width, and 11.400 mm overall width with side lip, helping it seat correctly in the housing while maintaining a controlled sealing surface at the shaft.

National has supplied sealing products for more than 75 years, and this part reflects that focus on drivetrain sealing accuracy. It is a strong match for Volvo AWD platforms including S60, S90, V60, V90, XC60, XC90, XC70, S80, S60 Cross Country, V60 Cross Country, V90 Cross Country, and V70, as well as Ford Five Hundred, Ford Freestyle, and Mercury Montego applications listed with Haldex PTU transfer cases. This part cross-references 5F9Z-7H426-AA and 01035432 for the same application.

What It Helps Fix

• Transfer case fluid seepage at the companion flange
• Oil leakage around the PTU shaft seal area
• Contamination from worn or hardened sealing lips
• Loss of sealing integrity in high-mileage AWD drivetrains
• Service issues caused by incorrect seal dimensions

Installation Notes and Tips

• Verify the housing bore is 65.000 mm and the shaft is 45.000 mm before installation.
• Inspect the flange surface and shaft for grooves, corrosion, or wear that could affect sealing.
• Clean the seal bore and mating surfaces thoroughly before pressing the seal into place.
• Confirm the transfer case application uses a Haldex PTU transfer case with full-time 4WD and 1-speed configuration.
• Match the seal orientation to the counter-clockwise spiral lip design during installation.

Quality Assurance

National is a long-established sealing brand with a reputation built on drivetrain and oil-seal applications. Part number 711122 is manufactured as a metric transfer case seal to support accurate fitment and dependable sealing performance in the listed Volvo, Ford, and Mercury AWD applications.