I'm doing a flex disc and centerline refurb and my U-joint feels notchy. How much is too much? I was having a vibration in the 45-55 mph range. Could this be the issue? The U-joint bearings are staked in. I've seen some old threads about cutting the stakes and replacing the bearing. Has anyone had long term luck? What are my options?

Also in the FSM it shows a clip holding in the center bearing dust cap. I don't have on e that I can see on mine. Is that typical? Do I just pry off the cap?