I have a 2000 Volvo s80 2.9 non turbo and it is automatic. Recently I was driving my vehicle and I stopped at a red light and when it turned green I was unable to accelerate. I had to apply gas to let it rev very high and then the car would slowly transition but if I stopped I had to do it all over again to get it up and moving. I was able to fill up transmission fluid and run it steady but it will only go in reverse or accelerate if I rev it high and wait till it transitions. After filling up the fluid it later with car off dripped out the right front side of car. What could this be or is there ideas for me to try and locate my problem?