I have a thunk in the front suspension that started on the drivers side a long time ago but now is on both sides when you hit a bump. I jacked it up and did a thorough pry and shake of everything. The only thing I can find is what appears to be excess play in the control arm bushing (big one). If you stick a big screwdriver in there you can move the control arm up and down around the bushing pretty easy, even with the wheel on the ground. So are they bad?