so I have a 2011 Ford flex 171,000 miles, it has had new sway bar links...ball joints...inner and outer tie rods... wheel bearings....new tires...you name it.....and getting ready to unfortunately have to put new steering column shaft in it Saturday. But the extra issue I'm having is when I'm driving down the road it's vibrating like something is falling off like I'm on a rough road.... everything is about new under it...can't figure it out...going over bumps i feel a flopping feeling like something is moving..... everything is tight....it's been aligned....so hell if I know...wish i never would have seen this vehicle its junk....any ideas would greatly help