4 Runner Ball Joint Replacement . Cars and trucks will have multiple ball joint assemblies depending on their type of suspension system. Yes, it is true, Toyota doesn't sell only the ball joints. 1999 Toyota 4Runner Replacement Ball Joints – CARiD.com (Joel Love) Going to replace the upper and lower ball joints on both sides. The only reason I would consider replacement of the whole lower arm would be if it was damaged/bent. The lower ball joint boot was damaged during replacement of the driveaxle. The proper method, when you really wanna do it, is by using a ball. When added to control arms, ball joint assembly is the perfect fit for steering and suspension applications. Moog Replacement New Front Lower Ball Joints Pair For ... New Suspension Kit Upper & Lower Ball Joints for Toyota ... Moog New Replacement Upper & Lower