Dorman 986-996 Drive Shaft - Rear

Rear Drive Shaft for Cadillac CT6

This Dorman drive shaft assembly is a direct replacement for select rear applications on the 2017-2018 Cadillac CT6 with RPO code HP9. Part number 986-996 is supplied as a complete assembly with pre-balanced construction and new yokes, tubes, CV joints, and universal joints for a straightforward driveline repair.

Key Features

• Fits 2017-2018 Cadillac CT6, rear, with RPO Code HP9 (45KW Continuous Power Plug-In Electric Parallel Hybrid Propulsion)
• Complete drive shaft assembly for standard replacement service
• Pre-balanced for installation readiness
• 100% new yokes, tubes, constant velocity joints, and universal joints
• Steel shaft construction with bolt-on end types
• Compressed length: 65.875 in; drive shaft length: 66.875 in
• Pre-greased design with no grease fitting included
• Part number 986-996

Detailed Description

Dorman 986-996 is a rear drive shaft assembly built for the Cadillac CT6 platform listed above. It uses steel construction, a 2.5 in shaft diameter, 0.083 in wall thickness, and a bolt-on connection at both ends. The assembly is pre-greased, does not use a slip yoke, and is not phased or overall-length adjustable. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

For buyers searching for a rear drive shaft for 2017-2018 Cadillac CT6 HP9 hybrid models, part number 986-996 provides a complete replacement solution that matches the listed dimensions and mounting style. It is a practical option when the original shaft is worn, damaged, or out of balance.

Common Repair Uses

• Vibration from a worn or unbalanced rear driveshaft
• Noise during acceleration or deceleration from driveline wear
• Damage to yokes, tubes, or joint components
• Service replacement for a failed rear shaft on Cadillac CT6 HP9 hybrid applications
• Restoring driveline operation after shaft fatigue or impact damage

Installation Notes and Tips

Verify the vehicle’s RPO code HP9 and confirm rear-position fitment before ordering. Compare the compressed length, flange-to-flange length, and shaft diameter to the original part to ensure proper fit. Inspect mating flanges and related driveline components during installation, and torque all fasteners to factory specifications.

Quality Assurance

Dorman supplies this assembly as a standard replacement driveline component with new internal and external shaft hardware already incorporated into the unit. Part number 986-996 is built for the listed Cadillac CT6 rear application and is ready for installation after fitment verification.