have a "clicking/popping" sound from the front passenger wheel, a friend who a mechanic but has never worked on a LC says I need an axle rebuild.. it started out of nowhere, driving at slower speeds sounds like something is stuck in my tire. cant feel anything different, just sounds awful. at higher speeds i cant hear it. anyone have any thoughts?? And is this something I could do on my own?? I just changed pads and rotors a few months ago, how much more involved would this be?? Hoping I dont have to drop alot of cash..