Ramcharger vibrates after using 4wd

It has the automatic front hubs. I had them apart in the spring. Not saying it is not unlocking, but I feel no shimming in the steering wheel. Just through the floor. Guess that's another area to look at. I did engage the 4wd a few times and it still has same problem.
The front shaft spins freely and I don't feel it binding. I grease the front spline often and I actually pumped grease in everything again today. Still no change. There is no snow buildup anywhere. It is in a heated garage.