I'm rebuilding the front end on a 96 Impala. The upper control arm cross shaft has a serration on the rear end of the shaft, that a serrated washer fits on, then the bushing, which also has serrations in it.
Anyone know what the purpose of these serrations is? And, more importantly, it is more "serrated" on one side than another - that is, it will mesh tightly with the serrations of what it's next to- any idea which side goes next to the shaft, and which side next to the bushing?