Dorman 520-391 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Overview of Dorman Suspension Control Arm and Ball Joint Assembly

The Dorman 520-391 suspension control arm and ball joint assembly is designed specifically for Ford F-150 and Lincoln Mark LT models. This pre-greased, aluminum control arm assembly offers a reliable replacement option for light suspension grade applications, ensuring proper vehicle handling and suspension performance.

• Pre-greased for immediate installation
• Includes rubber bushings and mounting hardware
• Aluminum control arm with black finish
• Press-in ball joint with threaded stud included and installed
• Compatible with Ford F-150 and Lincoln Mark LT

Detailed Product Features and Specifications

This Dorman suspension control arm and ball joint assembly (part number 520-391) features a casting/forged aluminum control arm designed for durability and corrosion resistance. The assembly includes rubber bushings to reduce vibration and noise, and the ball joint is press-in mounted with a 14 mm threaded stud for secure attachment. The control arm measures up to 288.5 mm in width and 237 mm in length, with a single 12.3 mm mounting hole. The black finish provides additional protection against wear and environmental factors. This assembly is pre-greased, eliminating the need for additional lubrication during installation, although it does not include a grease fitting.

Compatible Vehicles and Applications

This suspension control arm and ball joint assembly is compatible with the following vehicles:

• Ford F-150 (various model years)
• Lincoln Mark LT

It is designed for light suspension grade use, making it suitable for regular driving conditions and light-duty applications.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Ball joint wear leading to uneven tire wear or clunking noises
• Corroded or bent control arms affecting suspension alignment
• Vibration or noise from suspension components
• Loose or damaged mounting hardware impacting vehicle handling

Installation Notes and Tips

Installation of the Dorman 520-391 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and the control arm is pre-greased, the assembly is ready for direct installation. Ensure the mounting hole aligns properly with the vehicle frame and torque all hardware to manufacturer specifications. This part is not adjustable, so proper alignment should be verified after installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 520-391 suspension control arm and ball joint assembly undergoes quality inspections to ensure durability and performance. This product includes mounting hardware and bushings for a complete replacement solution. Warranty coverage details should be confirmed with the product documentation or supplier.