Mark R Fresno , CA July 30, 2018 Appliance: Whirlpool Dishwasher, Built-In/Undercounter WDT720PADM0 Whirlpool Dishwasher Wdt720padm0: Upper rack slides wheel supports were worn out. How to replace Dishwasher Rack Stop Clip. Replaced all the wheels and rack stops--works very good 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes