Matthew B Frankfort , IL August 22, 2014 Appliance: Whirlpool Undercounter Dishwasher DU1145XTPB8 Whirlpool Dishwasher Du1145xtpb8: Bottom rack had broken and rusting posts. How to replace Dishrack. Replaced the bottom rack. Couldn't have been easier. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes