Moog RK621666 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Overview of Moog RK621666 Suspension Control Arm Assembly

The Moog RK621666 suspension control arm and ball joint assembly is engineered for reliable performance on select Ford, Jaguar, and Lincoln vehicles. Designed with durability and precision in mind, this pre-greased control arm assembly is compatible with models such as the Ford Thunderbird, Jaguar XJ8, and Lincoln LS.

• Pre-greased for immediate installation and reduced maintenance
• Includes rubber bushings and mounting hardware for a complete replacement
• Forged aluminum control arm construction for strength and corrosion resistance
• Press-in ball joint with threaded stud for secure fitment
• Compatible with Ford Thunderbird, Jaguar S-Type, Lincoln LS, and other specified models

Detailed Product Features and Specifications

The Moog RK621666 control arm assembly features a forged aluminum control arm finished in gray, providing a balance of lightweight strength and corrosion resistance. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. Rubber bushings are included to help absorb road vibrations and reduce noise, enhancing ride quality. The ball joint is press-in mounted with a threaded stud type, ensuring a secure and precise fit. Mounting hardware is also included, allowing for a straightforward replacement process. The control arm measures up to 12.560 inches in maximum length, designed to meet exact OEM specifications for proper suspension geometry.

Compatible Vehicles and Applications

This suspension control arm and ball joint assembly is compatible with a range of Ford, Jaguar, and Lincoln models, including:

• Ford Thunderbird
• Jaguar XJ8 and XJR
• Jaguar S-Type and Super V8
• Lincoln LS and Vanden Plas

When searching for a suspension control arm for your Jaguar XJ8 or Ford Thunderbird, the Moog RK621666 offers a direct replacement option engineered to meet factory standards.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Loose or failing ball joints leading to uneven tire wear
• Corroded or bent control arms affecting suspension alignment
• Excessive vibration or noise from suspension components
• Difficulty maintaining proper wheel alignment

Installation Notes and Tips

Installation of the Moog RK621666 control arm assembly requires basic suspension knowledge and tools. Since the part comes pre-greased and includes bushings and mounting hardware, it simplifies the replacement process. Ensure the vehicle is securely lifted and supported before beginning work. It is recommended to have a professional alignment performed after installation to maintain proper handling and tire wear.

Quality Assurance and Warranty

Moog is known for manufacturing suspension components that meet or exceed OEM standards. The RK621666 control arm assembly undergoes rigorous testing to ensure durability and performance. This part includes a limited warranty covering defects in materials and workmanship, providing confidence in its long-term reliability.