I heard grinding noises when my wheel bearing went bad but sence my truck always makes noises i didnt think anything of it until i got the my auto shop class and looked at the wheel. The hub had exploded and the outer bearing was gone so was most of the hub im lucky that my wheel did not come off.
But ya its not that hard to change the wheel bearings and i was lucky the local pick and pull had a 62 chevy tat i could get a new hub from.
just thought id tell my story.