2004 Ford F-150 noise coming from front of truck

Noises problem
2004 Ford F150 V8 Four Wheel Drive Automatic

in the morning when I leave for work there is a noise the best way to descibe it is it sounds like a card in the spokes of a bycicle. I put it in 4wheel high and it stops take it out and it starts agian it does this for about 10 miles and if you hit a bump it stops for the rest of the day but starts all over agian the next morning. What is causing this