'73 dodge ramcharger

what would cause my right front tire to lock up? ive put new bearings and new brake pads on and it still locking up?

2wd or 4wd?

4wd.. could i have broke the axle or some teeth?

try turning the right front while it is jacked up and see if it will lock up .if you don't see any reason for it to lock up then its gonna be in the front differential.