1990 MPV making screeching sound in Park and Neutral

What is your question?

I have a 1990 Mazda mpv v6 3.0L RWD with 220,000 miles on it, whenever I start the car it makes a loud screeching sound, it sounds like its metal on metal. It only will make the sound in park and neutral though. When I shift into gear everything sounds normal. Does anyone have any suggestions as to what this could be? Oh and the transmission has about 150,000 miles on it.