Noisy Maytag washer during spin cycle

Our Maytag washer makes a clanking noise during the spin cycle. (coming from the back of the unit) The sound level depends on the drum speed. The washer also has a tendency to vibrate a lot during a high speed spin. Washer completes all cycles and besides the noise and vibration works fine. It looks to me that over time the noise is getting louder. What’s wrong and how can I fix this?