Moog K6129T Ball Joint 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. An enlarged ball joint receptacle in the control arm can cause a loose ball joint fit. Moog Problem Solver design includes an oversized housing for a more secure fit. Wear indicator allows for quick visual inspection without lifting the vehicle. Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Use on 1971 - 1996 GM trucks Use on 2-wheel drive vehicles Ball joint is greasable Dust boots included Improves chassis performance and durability