Moog CK8423 Control Arm and Ball Joint Assembly Problem Solver powdered metal gusher bearing design enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability. Problem Solver patented cover plate design allows for tighter tolerances vs traditional cover plate designs, providing a more durable and extended life part. Exclusive cover plate protects against contaminants leaking into the bearing surface. Belleville washer preload provides lower torque and stud articulation with minimal axial clearance. Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Loose or worn chassis parts can lead to premature tire wear Use on 1984 - 1994 Ford vehicles Designed as stock replacement Improves chassis performance and durability Easy to install