Ok I have a 04 f150 4door. When its cold in the mornings seems like below freezing I have a grinding noise from my front right side while going down the road. Sounds like its in the hub. I can put it in 4wd and it stop. This morning it got worse. I put it in 4wd to make it stop and the front end was popping this time on both sides while driving. What can this be??? I don't wanna ruin anything? Thanks