National 710972 Transfer Case Input Shaft Seal - Outer

Transfer Case Input Shaft Seal for Ford Escape

National 710972 is a premium transfer case input shaft seal built for outer-position applications on select Ford Escape and Mercury Mariner models. It uses FKM sealing material and a bi-directional helix design to support consistent sealing performance in transfer case service.

Key Features

• Transfer case input shaft seal for outer-position applications
• FKM sealing material for durability in demanding drivetrain environments
• Bi-directional helix type
• Premium grade construction
• Outside diameter: 2.715 in; housing bore: 2.708 in
• Shaft diameter: 2.25 in (57.25 mm)
• Flanged outside diameter: 2.889 in
• Width: 0.265 in; overall width with side lip: 0.295 in
• National 710972 is part of the 710900 series

Detailed Description

National 710972 is an oil seal for the transfer case input shaft, engineered for outer-position service on 2001-2012 Ford Escape and 2005-2011 Mercury Mariner applications. The FKM sealing material is selected for sealing performance in drivetrain environments, while the bi-directional helix helps maintain sealing contact regardless of shaft rotation direction. National has a long history in sealing technology and continues to apply modern design practices to current vehicle needs. This part cross-references Ford 6L8Z7H469B for the same application.

What It Is Used For

• Replacing a worn transfer case input shaft seal on Ford Escape models
• Replacing a leaking outer transfer case seal on Mercury Mariner models
• Addressing transfer case fluid seepage around the input shaft
• Restoring sealing integrity after age-related seal hardening or wear
• Correcting contamination concerns caused by a compromised seal

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal orientation before installation. Clean the sealing surface and inspect the input shaft for scoring or wear that could affect seal life. Confirm outer-position fitment against the vehicle application before assembly. For best results, install the seal squarely to avoid lip damage during service.

Quality Assurance

National is recognized for sealing solutions backed by more than 75 years of industry experience. Part number 710972 is built as a premium replacement seal for transfer case service on Ford Escape and Mercury Mariner applications.