When in agitate cycle, tub spins and being full of water, it spins over the sides of the tub.

It sounds like a problem with the pump being stopped up. Check the filter. There should be a clean-out plug that you can remove to remove any trash. The water should be pumped out before it starts spinning. Look at these manuals: https://dl.dropbox.com/u/8010163/Frigidaire%20Washers.zip
https://dl.dropbox.com/u/8010163/Understanding%20automatic%20washer.pdf
https://dl.dropbox.com/u/8010163/How%20to%20use%20Test%20Equipment%20Service%20Manu al.pdf
You will have to use a meter to check it out, too. Get a decent digital meter at Radio Shack that will give a trustworthy reading.