Re: Maytag Problems:
Before doing anything, you might want to check out all of the Wiring, to make sure that everything is plugged in properly and check around the Water Level Switch, to make sure there isn't something that might have possibly caused a blockage around the water level control actuation part that goes into the housing that causes the Fill Stop and Agitation Starting.
I'm not familiar with the workings of Suds-Saver's, but I know there are several here who have worked on them and can help you further with that part of needed attention. If I remember correctly, someone told me with a similar Solenoid "Buzzing" problem of a different nature, to spray a little WD-40 where the Part's come together, when the Solenoid is activated. That should allow the Solenoid to operate quitely again. {be sure to unplug the washer first} and try to wipe any access off from around the electrical contacts.
It sounds like the Brake Pads are worn, or possibly something out of alignment, which will be some extra checking to see for sure what's causing the "Screetching" when Breaking.
You might be able to push the Water Level Button's several times slightly fast, but carefully {back and forth between them} if the Washer has been sitting idle for quite some time and possibly get all of them activating properly, at least it is worth a try. I had that happen to a Friend's Water Temp's once, after I had replaced the Water Valve, it was still having the same problem, until I pushed the Buttons back and forth, changing the Selection's. I figured out that there might have been some Dirt on one of the Contacts and the excessive movement seemed to correct the problem. The Washer has been operating properly ever since and it's been way over 1 or 2 year now and lots of Laundry being Washed.
"Good-Luck" I hope that this helps you, with getting these problems taken care of and getting the Washer operating again.
Peace and Happy Maytag "Sudz-Saving" Days,Steve
SactoTeddyBear...