Dorman 986-421 Drive Shaft - Rear

Dorman 986-421 Drive Shaft Overview

Dorman 986-421 is a complete drive shaft assembly for driveline repair where a direct replacement is needed. It arrives pre-balanced and uses 100% new yokes, tubes, universal joints, and other core shaft components for a ready-to-install service part.

Built with a steel shaft, 2.5 in diameter, and 70.75 in compressed length, this drive shaft is a practical choice for vehicle-specific driveline service on compatible applications such as select Chevrolet Silverado and GMC Sierra models. The Dorman 986-421 is also referenced by part number 1234104106 for the same application.

Key Features

• Complete drive shaft assembly for driveline replacement
• Pre-balanced for installation readiness
• 100% new yokes, tubes, and universal joints
• Steel shaft construction
• 70.75 in compressed length and 2.5 in shaft diameter
• Triprong end 1 and triprong end 2 configuration
• Universal joints included; CV joints not included
• Non-greaseable design with no slip yoke

Detailed Product Description

Dorman 986-421 is engineered as a direct replacement drive shaft assembly for driveline service where the original shaft is worn, damaged, or out of balance. The assembly uses a steel tube with 0.065 in wall thickness and a fixed overall length of 70.75 in, making it a straightforward option for applications that require the same compressed length and triprong-to-triprong end configuration. For buyers searching for a replacement drive shaft for Chevrolet Silverado or GMC Sierra driveline repair, this part number provides a complete assembly approach rather than rebuilding individual shaft components.

This part number, Dorman 986-421, is intended for compatible vehicle applications that call for a non-adjustable shaft with universal joints included and no CV joints. It is a practical fitment-focused option for service work where maintaining driveline geometry and balance is important.

What It Helps Address

• Vibration caused by a worn or out-of-balance driveshaft
• Clunking or driveline noise from failed universal joints
• Damage to the original shaft tube or yokes
• Service needs after driveline wear on compatible Chevrolet Silverado and GMC Sierra trucks
• Replacement of a shaft that no longer maintains proper length or balance

Installation Notes and Tips

Verify compressed length, end type, shaft diameter, and driveline configuration before installation. This assembly is not adjustable and does not include a slip yoke, so matching the original application is important. Confirm that the vehicle calls for a triprong end on both ends and that the existing driveline setup does not require CV joints. Professional installation and post-installation driveline inspection are recommended to confirm alignment and smooth operation.

Quality Assurance

Dorman supplies this drive shaft as a complete replacement assembly with new core components and pre-balanced construction to support consistent fit and function in the intended application. The part is built to service the driveline as a direct replacement component for compatible vehicles.