Lower wash arm not turning, poor cleaning of dishes

Determined wash arm not turning. dismantled washer assembly to impeller. Found discharge assembly had broken causing a plastic plate inside of it to cut holes in the sides. Water was being forced out the sides instead of up into washer arms. Replaced discharge assembly and just in case, the impeller as well. Reinstalled impeller and discharge. Took out filter and cleaned it thoroughly. Reassembled washer arm assembly. dishwasher works like new.