hello all. i own a 2003 taurus. i began to get some slippage problems when cornering. i parked the car and while runnin checkd the fluid. it was just below the bottom fill line. i got back in the car and it wouldnt move in reverse or drive.all gears are gone. now the fluid level is reading over full but i didnt put anything in. what can cause me to loose everything and give me an overfull reading? thanks!