Moog RK640331 Suspension Control Arm - Front Upper

Front Upper Control Arm for Jeep Applications

Restore suspension geometry and steering response with this Moog front upper suspension control arm, part number RK640331. It is built for Jeep TJ, Wrangler, Cherokee, and Grand Cherokee applications with stamped steel construction, rubber bushings, and a painted black finish for corrosion resistance.

Moog RK640331 is a direct-fit suspension control arm for front upper positions on select Jeep models. It is engineered for structural strength and protection against corrosion, making it a practical OE-style replacement for worn or damaged suspension components.

Key Features

• Stamped steel construction for strength and durability
• Black painted finish for added corrosion protection
• Rubber bushings included for suspension isolation
• Front upper control arm application
• Non-adjustable design for direct replacement use
• Moog part number RK640331

Fitment Details

• Fits 1997-2006 Jeep TJ, front upper. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 1997-2006 Jeep Wrangler, front upper. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 1992-2001 Jeep Cherokee, front upper. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 1993-1998 Jeep Grand Cherokee, front upper. Suspension control arm and ball joint assembly meets OEM standards.

What This Part Helps Address

• Excessive front-end looseness or wandering
• Clunking or knocking from worn suspension bushings
• Uneven tire wear caused by worn control arm components
• Reduced steering stability on Jeep TJ and Wrangler models
• Suspension noise from deteriorated upper control arm bushings

Installation Notes and Tips

This control arm is not pre-greased and does not include a grease fitting, ball joint, or mounting hardware. Verify front upper position, vehicle year, and model before installation. Because this part uses rubber bushings and a stamped steel body, inspect adjacent suspension components and alignment settings during service. This part cross-references Dorman OE Solutions 520-337 for the same application.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection for foreign and domestic nameplates. RK640331 is built as a regular-grade suspension replacement for Jeep front upper applications and is intended to meet OEM standards where listed.