904 rebuild

Thanks for the reply, I would like a 904 specific video or manual. I am dumb that way. It just avoids any confusion. I hate going to a trans shop because I know nothing about transmissions. I am sure transmission shops like their customers that way. From what I understand, cleanliness is important, what is the best way to clean out the transmission once it is all apart? I dont have 5 gallons of solvent laying around. Is there a water based cleaner? Keep the info coming.