ok, so I have a 2004 tahoe with 3" lift. When I did the lift 6 months ago I replaced the stock bearings with TIMEKEN and everything was fine until about a month ago. I started to notice a girding noise like a bearing was going out. I raised the front up and checked the passenger side and everything was solid, rocked the tire at 12 & 6 and 3 & 9. Did the same on the drivers side and same thing, all was solid. I though ok, maybe I detected it early and replaced both under warranty. Well I still have the noise. I checked the rear and same thing, all solid. I have extremely little brake drag, took my center caps off and still have the noise. The confusing thing is it only has this grinding noise when I start to drive it after it sits for a little bit (in mornings and even less when leaving work), maybe the first 2-300 feet and then it goes away. Am I worrying about nothing or am I missing something?