Two weeks ago my truck started to shake a bit at cruising speeds. (40-60mph). Then it went away. But now It shakes so bad that my dashboard almost flys apart. So I jacked it up and gave the front wheels a shake. The lower ball joints definitely need replaced. Theres pry an inch of play. So I figured I might as well replace the upper and lower ball joints. I know that either the top or the bottom one is factory pressed in. My question is how does one go about replaceing the one thats pressed in. Or can a do-it-yourself person do it? I've changed ball joints before but it's been a while and I don't think I've been lucky enough to change one that was pressed in. Of course I've never work on I-Beam suspension before either. Help would be greatly appreciated. :)