My dishwasher was broken with a failed heating element. I replaced the heating element but now the dishes are all coming out with a grey film. We reduced the amount of dish soap and it was great for 2 weeks. Now it is really bad. There is also a loud grinding noise. Broken pump? Motor? what to look for?

Sorry for the delay but I have been spending quality time with the dishwasher. Here is what I am observing. Noise is coming from the bottom of the dishwasher when it is close to draining out or has completely drained the tub but continues to run for a short period: I hear the water flowing in the sink drain then a loud rattling noise. When washing the DW makes a swish followed by a groan then swish and groan. I dismantled the spray arms and the bottom drain sump area. I found a couple peas and a few slices of potato. I cleaned all these out and verified the spray arms did not have any obstructions. I ran the DW without anything in it on the rinse cycle about 5 times and the gray water turned less gray. This improved the machine but it still has to run on Pots & Pan + hi-temp + Sani-Rinse to clean dishes that are almost clean when I place them in the DW.

Yes, I did. I took the front panel off (it is still off). Laid on the floor with a flash light and kept my hand on various parts. Seems the noise is close to the front of the DW. When it fills it sounds like a small weed trimmer gas engine at idle but very quiet. When it drains is sounds solid and full of water then toward the end it gets loud and rattles.
I tried to open up the baffle under the main spray arm in front where I found the potatoes but could not.

Check the chopper as described in the attached file. Make sure it is connected properly with the pump impeller.

- The chopper Part number: AP3039186