We replaced both the bottom and the top racks. It was easy and fast. The bottom rack you just remove and replace without any tools. The top rack you have to disconnect the front clips so that you can remove it. Then we had to remove 4 top round slider rings from the new rack so that it would fit. our dishwasher already had the correct piece in the back of the dishwasher so we didn’t have to change it. Once the new top rack was in we reinstalled the front clips.