National 710597 Transfer Case Shift Shaft Seal

Transfer Case Shift Shaft Seal for 4WD Applications

National 710597 is a transfer case shift shaft seal built for vehicles that need a precise sealing surface around the shift shaft. It uses polyacrylate sealing material and measures 0.750 in. inside diameter, 1.008 in. outside diameter, and 0.225 in. width for a direct-fit service part in supported transfer case applications.

This seal is used in a wide range of Jeep, Dodge Ram, Chevrolet Silverado, and GMC Sierra 4WD platforms with New Process transfer cases. National 710597 is also cross-referenced with AP Exhaust 7535 for the same application.

Key Features

• Transfer case shift shaft seal / oil seal
• Polyacrylate sealing material for sealing performance in transfer case service
• 0.750 in. shaft diameter and 1.000 in. housing bore specification
• 0.225 in. width for compact transfer case sealing locations
• National 710597 part number for catalog lookup and replacement matching
• Series 710500 design from National sealing systems

Detailed Description

National has supplied sealing components for more than 75 years, and the 710597 transfer case shift shaft seal reflects that focus on dimensional accuracy and material selection. The seal is specified with a 19.050 mm inside diameter, 25.600 mm outside diameter, and 5.720 mm thickness, making it a practical replacement for transfer case service where shaft sealing is critical. In supported applications, it helps maintain fluid control at the shift shaft area of the transfer case.

Fitment coverage includes Jeep Wrangler, Jeep TJ, Jeep Cherokee, Jeep Liberty, Dodge Ram 1500, Dodge Ram 2500, Dodge Ram 3500, Chevrolet Silverado 1500, Chevrolet Silverado 2500 HD, GMC Sierra 1500, and GMC Sierra 2500 HD applications with listed New Process transfer case configurations. Use the vehicle notes to confirm the exact transfer case type before ordering National 710597.

What This Part Helps Address

• Transfer case fluid seepage at the shift shaft
• Wet or contaminated transfer case housing around the shaft opening
• Seal wear from age, heat, and drivetrain use
• Service replacement during transfer case repair or rebuild
• Loss of sealing integrity in 4WD transfer case applications

Installation Notes and Tips

Verify the transfer case model and configuration before installation, since this seal is listed for multiple New Process units across Jeep, Dodge, Chevrolet, and GMC platforms. Match the shaft diameter, housing bore, and width to the original seal, and inspect the shaft surface for grooves or damage before installing the new seal. Clean the bore thoroughly so the seal seats evenly.

For fitment reference, this part fits 2003-2019 Jeep Wrangler, 2011-2017 Ram 1500, 2004-2010 Dodge Ram 1500, 1999-2007 Chevrolet Silverado 1500, and 1999-2007 GMC Sierra 1500 in the listed transfer case configurations.

Quality Assurance

National is a long-established sealing brand known for OE-style sealing solutions across drivetrain service categories. Part number 710597 is built to the published dimensional specifications and material listing for transfer case sealing applications.