Loud clunking sound during the spin cycle, washer is balanced and on 2nd floor

If you get a very loud noise coming from the machine, and this noise islouder when it spins faster, then it is often because of a problem with the drum bearing.

The drum bearing is bad, probably drum bearing spider had broken.

On a front load the drum bearing is located at the back of the drum.

To replace the part you take apart machine, undo the belt and depending on the model you may need to remove more parts.

You can find parts and diagrams for most models here.