Dorman 986-991 Drive Shaft - Rear

Dorman 986-991 Rear Drive Shaft

This Dorman drive shaft assembly is built for rear applications on select Lincoln Mark VII and Lincoln Continental models. Part number 986-991 is supplied as a complete, pre-balanced assembly with new yokes, tubes, universal joints, and CV joints where specified by the design.

Key Features

• Complete drive shaft assembly for rear driveline service
• Pre-balanced for installation readiness
• 100% new yokes and tubes
• Universal joints included
• Steel shaft construction with 3-inch diameter
• Pre-greased and phased at 0 degrees
• Slip yoke end 1 and bolt-on end 2
• Compressed length: 62.375 in.

Detailed Description

Dorman 986-991 is a standard replacement drive shaft assembly for rear driveline repair on 1986-1992 Lincoln Mark VII and 1984-1987 Lincoln Continental models. It measures 62.375 inches in compressed length, uses a steel shaft with 0.065-inch wall thickness, and arrives pre-greased for service preparation. The assembly is configured with a slip yoke at one end and a bolt-on connection at the other, making it a direct-fit driveline service part for the listed applications. This part cross-references E8LY4602A for the same application.

Common Repair Uses

• Restores driveline function after a bent or worn shaft
• Addresses vibration caused by worn universal joints
• Replaces damaged yokes or tube sections
• Corrects driveline noise from excessive shaft wear
• Supports repair of rear driveline failure on Lincoln Mark VII and Lincoln Continental vehicles

Installation Notes and Tips

Verify compressed length, end types, and rear position before installation. Confirm the vehicle’s driveline configuration matches the listed fitment for 1986-1992 Lincoln Mark VII, rear, and 1984-1987 Lincoln Continental, rear. Inspect mounting points, flange surfaces, and related driveline components during replacement to ensure proper alignment and smooth operation. Part number 986-991 should be matched to the vehicle application before removal of the original shaft.

Quality Assurance

This Dorman assembly is built as a complete replacement driveline component with new yokes, tubes, and joints, and it is pre-balanced for installation readiness. Dorman 986-991 is engineered for standard replacement service on the listed Lincoln applications.