I don't think it's normal but could be wrong. I was checking things out on my 79' bronco and when I was checking out steering issues found that my steering box moves when in action. Not like its loose, but in my opinion, like the frame is flexing. After inspecting for cracks (as best I could with out cleaning area) there was nothing I could tell was the reason. I am running 38" tires but at a stand still that shouldn't matter, just surface contact right? Anyways, any help would be appreciated. I don't know if it's normal. Oh, top moves 1/4"-3/8".