MY '07 H3 is in the shop for a similar problem. The dealership heard a whinning in the t-case. looked at it said everything is ok but put new bearings in it anyway. The noise I was hearing was a bump or rattle in the front end, I could feel it in the pedals along with hearing it. As stupid as this sounds the only time I hear it is when the ambient temp is above 85. and on longer drives. the dealership finally heard that wensday think its in the steering linkage. awaiting to hear back from them know. my H3 only has 3700 miles all highway no offroad yet.
