My 99 qx4 has a slight wobble

[elewis6661]

I have searched the posts for the last couple days and found a couple of threads that came close to my issue but did not address it directly. The issue/question I have is concerning a possible wheel bearing issue. I have replaced whell bearings on numerous other cars without an issue but never a 4x4. First when I am driving under 60 there is mo issues but when I get to 70 I get a slight wobble and it won't go away until I hit around 75 - 80 mph. Also, when I am parked I can push on the top of my wheel and feel the clunk. Today I took the wheel off and could move the rotor if I grabbed it with both hands. Which leads me to the wheel bearing. The heart of my question is are the any spcific issues I will encounter when replacing them? If you could provide me with proceedures that would be great.

ThanksErik