Dorman 600-218 Transfer Case Output Shaft Seal Kit

Transfer Case Output Shaft Seal Kit for GM Trucks

Dorman 600-218 is a transfer case output shaft seal kit for restoring the seal between the transfer case and motor. When the original seal is worn, liquid and debris can enter the transfer case and contribute to drivability concerns. This replacement seal is built for select Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, Sierra 3500 HD, Colorado, and Canyon applications.

Key Features

• Restores the transfer case output shaft seal at the transfer case-to-motor interface
• AEM rubber contact material for sealing performance
• Inside diameter: 18.3 mm
• Outside diameter: 56 mm
• Thickness: 2.5 mm
• Direct replacement for Dorman 600-218 applications

Detailed Description

This Dorman transfer case output shaft seal kit is made for service on GM 4x4 drivetrains where the transfer case seal has deteriorated or gone missing. By renewing the seal, it helps maintain separation between internal components and outside contaminants. It cross-references National 710675 and OE part number 19133170 for the same application. For buyers searching for a transfer case output shaft seal kit for a 2007-2019 Chevrolet Silverado 2500 HD or 2007-2019 GMC Sierra 3500 HD, Dorman 600-218 provides the correct service part for the listed transfer case configurations.

What It Helps Address

• Transfer case fluid leakage at the output shaft seal area
• Contamination from water, dirt, or road debris entering the transfer case
• Seal deterioration from age, heat, and drivetrain wear
• Drivability issues related to compromised transfer case sealing
• Service needs on GM trucks and midsize pickups with the listed transfer case codes

Installation Notes and Tips

Verify transfer case code and vehicle application before installation. This part is listed for 2007-2019 Chevrolet Silverado 2500 HD and Silverado 3500 HD with RPO code NQF, 2007-2019 GMC Sierra 2500 HD and Sierra 3500 HD with RPO code NQF, and 2015-2018 Chevrolet Colorado and GMC Canyon with RPO code NQ7. Clean the sealing surfaces thoroughly and inspect the shaft and housing for wear before installing the new seal. Confirm the seal dimensions match the service requirement: 18.3 mm inside diameter, 56 mm outside diameter, and 2.5 mm thickness.

Quality Assurance

Dorman manufactures replacement drivetrain service parts for repair applications where original components have worn out or failed. Part number 600-218 is built to service the specified GM transfer case applications and restore proper sealing performance.