Product review (5 stars): Problem Solved!!
Such a simple and inexpensive fix for the unbalance problem is magic.  Our rental in Florida had a real problem with the Whirlpool washer not being able to run a simple load without taking forever due to constantly being kicked out due to an unbalanced load.  A little research on the internet and the parts availability from Amazon for next day delivery solved the issue.  It really only takes 20 to 25 minutes to install and, presto, the problem disappeared.  Hard to believe that Whirlpool did not do a recall for this problem.