Too bad you didn't sign up on here right when your problems started, someone here could have helped steer you in a better direction on doing the process yourself.
I have seen them where people put different bulbs in them and they melt a hole in the housing, letting water in. There is a thread on here I think about mounting aftermarket fogs that I'm trying to find now for you.
So drain your transmission and change the filters, fill it to proper level with the proper fluid and go from there, you can do it in your driveway, then see how it runs. :thumb: