If your Samsung dishwasher's rack isn't gliding smoothly, there might be an issue with the roller assembly. The roller assembly (DD82-01669A) is a genuine Samsung part for your 24-inch front control tall tub dishwasher. Problems with the roller assembly can lead to difficulty in moving the dishwasher rack and may cause unusual noise during operation. To keep your dishwasher running quietly and efficiently, consider replacing the roller assembly. Verify your dishwasher model number for compatibility before purchasing.