Dorman 986-078 Drive Shaft - Rear

Dorman 986-078 Drive Shaft for Cadillac ATS

Restore driveline function with this complete Dorman drive shaft assembly for the rear of 2013-2019 Cadillac ATS models. Part number 986-078 is pre-balanced and built for direct replacement, with new yokes, tubes, universal joints, and a slip yoke already in place for a cleaner service job.

Key Features

• Complete drive shaft assembly for rear applications
• Pre-balanced for installation readiness
• 100% new yokes, tubes, and universal joints
• Steel shaft construction with 2.5 in diameter
• Greaseable design for serviceability
• Overall length adjustable for fitment needs
• Triprong end 1 and triprong end 2 configuration
• Drive shaft length: 46.5 in; compressed length: 44 in

Detailed Description

Dorman 986-078 is a replacement drive shaft assembly engineered for 2013-2019 Cadillac ATS rear driveline service. It uses a steel shaft with 0.083 in wall thickness and includes universal joints, while CV joints are not included. The assembly is greaseable and features a slip yoke, helping simplify replacement when the original shaft is worn, noisy, or out of balance. This part cross-references OE number 20763110 for the same application.

What It Helps Fix

• Driveline vibration from a worn or unbalanced shaft
• Clunking or driveline noise during acceleration or deceleration
• Excess play from worn universal joints
• Service issues caused by damaged yokes or tubes
• Fitment problems on rear drive shaft replacement jobs for Cadillac ATS

Installation Notes and Tips

Verify rear application fitment before installation on 2013-2019 Cadillac ATS models. Confirm compressed length, overall length adjustability, and triprong end configuration against the original shaft. Inspect related driveline components, including mounts and mating hardware, for wear before completing the repair. Part number 986-078 is intended as a direct replacement assembly, so matching the original configuration is important for proper driveline alignment.

Quality Assurance

This Dorman drive shaft assembly is built as a complete replacement unit with new core components and pre-balanced construction for consistent service performance. It is supplied as a steel driveline assembly for rear Cadillac ATS applications.