Originally Posted by Gearhead61
Brad you don't have front CV joints... You're 4x2
Oops, I didn't notice that.
Bad wheel bearings in the front MIGHT be the cause of humming. If they have seen a lot of mud and have never been repacked, it would probably be a good idea to go ahead and replace them. They are not that expensive (expect to spend around $25 or so in parts including grease) and an hour or two repacking them.