The wheel bearings are ok. I did not see any unusual movement from the universal joints in the front axles. I only have universal joints at the spindle end, not going into the differential. I assume that is what you meant by inner ujoint.
The other thing that may be significant is that the front axles and front drive shaft are turning all the time. It does not matter if it is in 4X4 or 4X2.
Just to make sure. I put the vehicle in 4X4 and watched both front axles and the front driveshaft turn. I had a friend drive while I watched. They took it out of 4X4, and then backed up 5 to 15 feet. I then looked underneath the vehicle again and saw the driveshaft and both front axles turning. Does this mean anything?