i had new gears put in a couple months ago (yukon 4.56's) with master install kits. I was under the jeep checking things out after the first 300-400 miles and i noticed the front pinion had a considerable amount of play. it was loose enough to cause noticeable vibrations. i figured the bearings had just broken in and loosened up so i took it to the dealership and they torqued it down for me. well, i was under the jeep again yesterday- same thing. i'm thinking it must be the nut because it probably has 700-1000 miles on it and i would have to imagine that things are getting much closer to being broken in. i am going to try and get it tightened up tomorrow but i feel like it's just going to come loose again. any ideas? maybe a new nut?