Reduced sound with a rotating filter for a dishwasher

A dishwasher for treating dishes according to at least one automatic cycle of operation and configured to sit on a support surface, comprising:

• a chassis having a portion sitting on the support surface;
• a tub supported by the chassis and at least partially defining a treating chamber for receiving the dishes for treatment;
• a sprayer proximate to the tub to spray liquid into the treating chamber;
• and
• a pump and filter assembly fluidly coupled between an outlet of the tub and the sprayer, comprising:
• a housing defining a sump having an inlet fluidly coupled to the tub and an outlet fluidly coupled to the sprayer;
• a rotating filter having an upstream surface and a downstream surface, the rotating filter located within the housing such that liquid being pumped through the pump and filter assembly passes through the rotating filter from the upstream surface to the downstream surface to effect a filtering of the liquid as the liquid passes through the rotating filter;
• a hollow shroud having a body at least partially enclosing the rotating filter and having at least one access opening;
• and
• a flow diverter located within the access opening and spaced apart from the upstream surface to define a gap through which at least some of the liquid passes as the liquid is being pumped;
• wherein the rotating filter has a first portion nearest the tub and a second portion nearest the support surface, and where no flow diverter is located at one of a first space between the first portion and the tub or a second space between the second portion and the support surface and where liquid passing through the gap between the flow diverter and the rotating filter applies a greater shear force on the upstream surface than liquid in an absence of the flow diverter.