We just aquired a maytag A606 washer. It seems to work fine, except during the spin cycle. During the spin cycle it is very noisy and makes thumping noises. It reminds me of a out of balance issue. It does not move the machine around the floor at all, just makes an awful racket. It does spin the clothes dry. But, when you run it empty, it is fine. What could be wrong and how do we fix it.