Need some help, 2000 xe 4x4. driving in any gear, at approx 1500-1700 rpm low level noise, rattle, vibration coming from pass.side front area. When out of gear(stopped or rolling) no noise. also, a sort of rubbing noise from front wheels in 2wd. If I move the 2-4wd stick to engage 4wd (but not engaging 4wd)the rubbing stops. when same stick pushed forward rubbing starts again. no rubbing noise in 4wd.