Dorman 539-983 Suspension Ball Joint - Front Upper

Dorman 539-983 Front Upper Ball Joint

Dorman 539-983 is a threaded suspension ball joint built for front upper service on select Ford, Mercury applications. It is precision-engineered and tested for reliable OE-style replacement on the 2006-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2006-2010 Mercury Mountaineer.

Key Features

• Threaded, press-in suspension ball joint for front upper placement
• Steel construction with grey finish
• Dust boot included for joint protection
• Premium suspension grade type
• Tapered stud design with 12 mm wrench size
• Mounting hardware included
• Brand part number: 539-983

Detailed Description

This Dorman suspension ball joint is engineered as a direct replacement for the original equipment design used on the front upper suspension of the Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer. The steel body, threaded design, and press-in mounting style support a secure installation in the suspension assembly, while the included dust boot helps protect the joint from road contamination. Dorman 539-983 is a practical choice when servicing worn front upper suspension components on these vehicles.

This part cross-references MOOG Chassis Products K500014 and Delphi TC4257 for the same application.

What It Helps Address

• Front-end looseness from a worn upper ball joint
• Clunking or knocking from the front suspension
• Uneven tire wear related to suspension joint wear
• Steering play caused by excess joint movement
• Restoring proper suspension articulation on Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models

Installation Notes and Tips

• Fits 2006-2010 Ford Explorer, front upper
• Fits 2007-2010 Ford Explorer Sport Trac, front upper
• Fits 2006-2010 Mercury Mountaineer, front upper
• Confirm suspension configuration before installation
• Press-in installation requires proper suspension service tools
• Inspect related bushings, control arms, and alignment settings during repair

Quality Assurance

Dorman designs this replacement ball joint to match the original equipment application and subjects it to testing for dependable service. Part number 539-983 is built for the specified front upper fitments on Ford and Mercury vehicles.