Dorman 521-420 Suspension Control Arm and Ball Joint Assembly - Front Left Upper or Front Right Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 521-420 suspension control arm and ball joint assembly is engineered for reliable performance on Dodge Ram 1500, Ram 2500, Ram 3500, and Ramcharger models. Designed with pre-greased components and included bushings, this assembly ensures smooth suspension operation and long-lasting durability.

• Pre-greased for immediate use and reduced maintenance
• Includes rubber bushings for effective vibration dampening
• Steel control arm with casting/forged construction for strength
• Ball joint installed with threaded stud for secure mounting
• Mounting hardware included for straightforward installation
• Compatible with light suspension grade applications

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman is built with a steel control arm measuring up to 288.5 mm in width and 237 mm in length. The assembly features a press-in ball joint with a 14 mm threaded stud and a 12.3 mm mounting hole diameter. Rubber bushings are included to reduce noise and absorb shocks, while the black finish provides corrosion resistance. The assembly is designed for non-adjustable suspension setups and includes all necessary mounting hardware for a complete replacement.

Compatible Dodge Ram Models

This Dorman 521-420 control arm and ball joint assembly is compatible with the following Dodge vehicles:

• Dodge Ram 1500
• Dodge Ram 2500
• Dodge Ram 3500
• Dodge Ramcharger

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing suspension noise
• Loose or failing ball joints affecting steering stability
• Corroded or weakened control arm compromising suspension integrity
• Vibration and uneven tire wear due to faulty suspension components
• Difficulty maintaining proper wheel alignment

Installation Notes and Tips

Installation of the Dorman 521-420 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 immediate installation. Ensure the mounting hole aligns correctly with the vehicle frame and torque all hardware to manufacturer specifications. This assembly is not adjustable, so proper fitment verification is essential before installation.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 521-420 control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship.