Tadaa, just found this myself, Whirlpool Corporation's instruction sheet for replacing that failed coupling.
http://www.marbeck.com/9704230_Installation.pdf
We have the same problem. looking at the forums, so do thousands.
KitchenAid for the way it's made?
Seems it fails pretty regularly, too.
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Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe. - Frank Zappa