is it a 4x4 ?? if its in 4x4 it might be theiner universal bearing cap
the neddle bearings are gone
wild ride here hang on tight
i work at a ford dealership and have seen this before, it could be your
ball joint(s). Not 100% positive, but they should be checked, it could
also be the link kits/sway bar rubbers, or as mentioned before it could be
the 4wd