Dorman 986-555 Drive Shaft - Rear

Dorman 986-555 Rear Drive Shaft

The Dorman 986-555 is a complete rear drive shaft assembly for select Cadillac STS models. It arrives pre-balanced and ready to install, with new yokes, tubes, CV joints, and universal joints where applicable to the assembly design.

Key Features

• Complete drive shaft assembly for rear driveline service
• Pre-balanced for installation readiness
• Steel shaft construction with a 2.5 in shaft diameter
• 57.125 in compressed drive shaft length
• 0.083 in drive shaft wall thickness
• Bolt-on end 1 and bolt-on end 2 connection types
• CV joints included; universal joints not included
• Overall length is not adjustable
• Standard replacement grade

Detailed Description

Built for rear driveline replacement, the Dorman 986-555 drive shaft is engineered for 2007-2010 Cadillac STS rear applications. This assembly is a direct-fit style solution for vehicles that need a replacement rear driveshaft with a fixed overall length and bolt-on ends. The steel construction, 57.125 in compressed length, and 0.083 in wall thickness support a straightforward service replacement. This part number, 986-555, is also a practical reference when searching for a rear drive shaft for Cadillac STS 2007-2010 models.

This part cross-references OE numbers 15233697 and 15937535 for the same application.

What It Helps Address

• Vibration from a worn or out-of-balance rear drive shaft
• Clunking or driveline noise from damaged shaft components
• Loss of driveline smoothness caused by worn CV joints
• Service replacement needs after shaft tube or yoke wear
• Fitment-specific replacement for a rear Cadillac STS driveline assembly

Installation Notes and Tips

Verify rear application fitment before installation on 2007-2010 Cadillac STS vehicles. Confirm the bolt-on end configuration, compressed length, and driveline dimensions match the original part. Because overall length is not adjustable, accurate vehicle identification is important. Inspect mating surfaces and driveline hardware condition during service, and follow factory service procedures for torque and alignment.

Quality Assurance

Dorman supplies this as a standard replacement drive shaft assembly with new core components and pre-balanced preparation for installation. The 986-555 is built to replace the original rear driveshaft on select Cadillac STS models with the specified OE-style fitment.