I have a Kenmore Elite washer m/n 110.23022100 that won't agitate. I have replaced the coupler and the problem is still the same. The coupler was not broken, just a bit worn. Even if I have the agitator removed it makes the same bad noises. Ideas?

Read this: https://dl.dropbox.com/u/8010163/Understanding%20automatic%20washer.pdf
And learn to use a meter. Buy a good meter and read this: https://dl.dropbox.com/u/8010163/How%20to%20use%20Test%20Equipment%20Service%20Manu al.pdf
You have been guessing, and that does not work in today's world.