Hey, I replaced my front drive shaft and it seemed to work fine but then a week later I put my truck in 4Hi and it started making a loud horrible clunking noise from the front end. I checked everything under the truck and everything looks good. My truck still engages in 4x4 and works. I got my truck up onto jack stands and rotated the tires, checked ball joints and cvs and nothing made that same noise so I think it might be internal. I got a friend to get underneath and listen for the buzz when I switched it to and from 4HI and that seems to be working as well : ( any ideas?