Im sure this has been answered already but im going to ask anyway, I have an '05 grand Prix GTP i took over from my wife. I have been driving it to and from work and noticed a whining sound. I know for sure that it is not from the supercharger. I can hear the SC when I step on the gas but I hear this second whining sound when im just cruising along or starting off from a stop. it is not the power steering, I topped off the reservoir. the sound does not change when turning the wheel. Could it be coming from the transmission?