I am getting vibrations from my front propshaft it doesn't affect me on the road because i have got free wheeling hubs, but if i engage them and go over 40 mph the front propshaft vibrates badly. I'm suspecting its the UJ's that are worn, is it worth putting new UJ's on or just bang a whole new propshaft with UJ's on it. I get quite a few clunks from it when i am off roading as well, could this cause any damage to the diff because of the slack?