After having a tire shop put on new tires, i decided to have a look at all of my front suspension, reason being my previous tires were wearing a little funny. So i put a jack underneath the front end, put her up in the air, grab hold of the passanger front tire, and to my surprise the wheel rocks about 2mm back and forth from top to bottom, not side to side. Im not a mechanic, but i think it may be a wheel bearing. I have looked at buying wheel bearings and noticed that there are inners and outers. Can someone tell me if this is possible to do at home, or is this better left to a shop with a press. I have changed wheel hub bearings before, but this is obviously a completely different animal! This is a 1994 pathfinder 4x4, and any info would be greatly appreciated.