Moog K6483T Idler Arm Problem Solver super duty design includes frame bracket and powdered metal gusher bearing that enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability. Double taper bearing design prevents potential movement in the bracket pivot. Moog engineered steel composition results in a stronger component 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 Fits 1988 - 1992 GM trucks Use on both 2 and 4-wheel drive vehicles Easy to install Greasable arms