Moog DS1147 Track Bar 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. Full ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering. Patent pending Sunoloy coated metal bearings provide smooth stud swing technicians and drivers prefer. 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 Fits 1984 - 1990 Jeep vehicles Use with both 2/4-wheel drive vehicles Easy to install All parts meet or exceed OEM (original equipment manufacturers) standards