So recently I have noticed in my 2002 SVT this whiring/whine noise when I accelerate.. but only when the window is closed and radio off. I assume its from the transmission. Transmission was replaced before I bought the car roughly 40,000 miles ago. I am not sure if the previous owner had replaced gear oil or not.. Do you think I need to change fluids or is it a bigger issue that I need to deal with asap? Or is this normal???