whirlpool washer LA500XTW0?

Hello,

By the circular part I am assuming you mean the agitator. Its possible your agitator clutch dogs are stripped. Remove the upper half of the agitator by removing the soap dispenser and then a cap. After that you should see a bolt for the agitator just remove it and the upper part of the agitator and the 4 dogs are underneath. If the bottom part of the agitator still goes back and forth during agitate, the dogs are more than likly your problem. Hope this helps.

JP
February 2006