All four wheels have new calipers and pads. I inspected the u-joints and wheel bearings and could not find anything wrong. When I am driving and the noise starts it will go away when I put it into 4wd and give it gas, but the noise will come back when I let off of the gas. I have also tried applying the brakes, putting slight pressure on the clutch pedal, and disengaging the clutch but the noise was still there. I have tried to take it to the dealer for them to inspect it but when I got close to the dealership the noise went away and I couldn't get it to come back until the next day. Any new ideas?