When the washing machine is in the spin cycle it shakes/viborates very badly. It is not the type of shake that it would do if it is off balance, but it is bad. We had thought that it was the floor the washer was sitting on since it only started after we moved to our current home. We added more support to the floor joists and it did nothing for our problem. What else should we check?

I have checked the problem with the washer empty and it did the same thing. Please help!