shake in front end

on my ford expedition, front end shakes really bad when i go over 60 mph and also when i hit a bump at high speeds i checked to see if it was the bearings they seem fine no movement plus tires starting to wear what should i check. I replaced the sway bar bushings they were really worn and lose thought that was the problem. I also inspected tie rods boots are pretty worn but the aren, t loose in anyway also check centrelink seams tight, doesn't seem bent also to let you know it goes away when I slow lower then 60. Also had upper control arms replace months ago plus rotors and calibers were changed