Product review (2 stars): Running design fixes rather than adequate design validation are ruining a good company's reputation
I bought ours from Lowes and three years later the wash plate has stripped it's splines.  I see a trend with the Whirlpool products were there is an issue they become aware of it and make a running change (adding a metal insert to the splutch pulley for example or change dishwasher try glide materials to those that won't destruct after 20 months) but you're going to have to call a repair person to take advantage of the parts clause of the warranty so those that can make the repair do an chalk it up to experience and buy the part and install it.  It seem endemic in the appliance industry right now.