Water in bottom of dishwasher after cycle complete. Pump sounds like debris in housing. Pulled both pumps and no major debris. Checked and cleaned screens and filter. Have I missed anything? Thanks in advance

Is dish washer discharge hose connected to an air gap or does discharge hose have a high loop?

High loop has been working good for 3yrs. That's when r&r the garbage disposer.

If it sounds like something is loose look in the arms and the motor, too. The sound is coming from somewhere. Maybe these will help: https://dl.dropboxusercontent.com/u/8010163/Whirlpool_Kenmore%20Dishwashers.zip
https://dl.dropboxusercontent.com/u/8010163/Dish%20Washers.pdf
https://dl.dropboxusercontent.com/u/8010163/Bosch%20Dishwasher%20Sears%20ServiceManual.pdf

Thanks DrTom, but it's a frigidaire dishwasher. I think I've got it the drain pump is the culprit, the motor flexes in the pump housing. It's 8+ years old, I think I got my monies worth. Will try a new pump before I get a new dishwasher. Wish me luck.

Here are some manuals on fixing your unit:
https://dl.dropboxusercontent.com/u/8010163/Frigidaire%20Dishwasher%202002%20Mechanical%20Mode ls%20%285995371183%29%20Service%20Manual.pdf
https://dl.dropboxusercontent.com/u/8010163/Frigidaire%20Dishwasher%2024%20inch%20Built-In%202001%20Mechanical%20%285995355186%29%20Servic e%20Manual.pdf
https://dl.dropboxusercontent.com/u/8010163/Frigidaire%202007%2018%20inch%20Dishwasher%20Servi ce%20Manual.pdf