National 341022 Transfer Case Oil Pump Housing Seal

Transfer Case Oil Pump Housing Seal for 4WD Repairs

National 341022 is a transfer case oil pump housing seal built for service on a wide range of part-time and full-time 4WD applications. It uses nitrile sealing material and precise dimensions to help maintain a tight seal at the transfer case housing bore and shaft interface.

National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on fit, material selection, and durability for drivetrain service.

Key Features

• Transfer case oil pump housing seal for drivetrain sealing service
• Nitrile sealing material for oil resistance in transfer case applications
• Inside diameter: 2.250 in. / 57.150 mm
• Outside diameter: 2.636 in. / 66.950 mm
• Thickness/width: 0.187 in. / 4.750 mm
• Housing bore: 2.625 in. / 66.680 mm
• National 341022 part number for catalog and cross-reference lookup

Detailed Description

This National transfer case oil pump housing seal is specified for vehicles using New Process transfer cases across Jeep, Dodge, Ram, Ford, Chevrolet, GMC, Cadillac, Hummer, Mitsubishi, and Isuzu applications. It is listed for a broad range of 4WD configurations, including part-time 4WD and full-time 4WD systems with 2-speed transfer cases. Common fitment examples include Jeep Wrangler, Jeep Cherokee, Dodge Ram 1500, Ford F-250 Super Duty, and Chevrolet Tahoe applications where the transfer case design calls for this seal.

National 341022 is engineered around the listed shaft and housing dimensions to support a proper seal at the oil pump housing area. This part cross-references Gates 22306 and Four Seasons 47909 for the same application.

Common Problems This Seal Helps Address

• Transfer case fluid seepage at the oil pump housing area
• Leaks caused by worn or hardened original sealing material
• Loss of sealing integrity during transfer case service or rebuild work
• Contamination concerns from a compromised transfer case seal
• Repeat leaks after replacing related drivetrain components

Installation Notes and Tips

• Verify transfer case model and configuration before installation, especially New Process 231J, 241OR, 243D, 246, 271, 273, and related units listed in fitment.
• Inspect the housing bore and shaft surface for wear, scoring, or debris before installing the seal.
• Clean all sealing surfaces thoroughly and confirm the seal seats evenly in the bore.
• Use the exact application notes for your vehicle, since fitment varies by transfer case type even within the same make and model.

Quality Assurance

National is a long-established sealing brand with more than 75 years of experience in drivetrain and engine sealing products. The 341022 seal is built to the published dimensions and material specification for the listed transfer case applications.

• Fits 2003-2019 Jeep Wrangler, N/A, with New Process 241OR Transfer Case, Part Time 4WD, 2 Speed
• Fits 2018 Jeep Wrangler JK, N/A, with New Process 241OR Transfer Case, Part Time 4WD, 2 Speed
• Fits 2011-2017 Ram 1500, N/A, with New Process 243D Transfer Case with Part Time 4WD and 2 Speed configuration
• Fits 1999-2016 Ford F-250 Super Duty, N/A, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 1999-2016 Ford F-250 Super Duty, N/A, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed
• Fits 1999-2016 Ford F-350 Super Duty, N/A, Fits Transfer Case Output Shaft Bearing for New Process 273 with Part Time 4WD, 2 Speed
• Fits 1999-2016 Ford F-350 Super Duty, N/A, with New Process 271 Transfer Case; with Part Time 4WD; 2 Speed
• Fits 2006-2010 Dodge Ram 1500, N/A, with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed
• Fits 2004-2010 Dodge Ram 1500, N/A, Fits New Process 243D Transfer Case with Part Time 4WD and 2 Speed configuration
• Fits 1999-2007 Chevrolet Silverado 1500, N/A, with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed