Look over to the right of the engine bay, to the left and below the battery.
There should be a small pencil wide tube that goes from the trasmission (bottom of your engine), up to about where the battery is. It's bent near the battery, and is not plugged into anything...supposedly, a mechanic told me it's a "breather" tube, and has to be kept open. I plugged it up one time (cuase it was just haning out in my engine bay, it looked like it belonged somehwere, so i plugged it into a bolt...), and my transmission would not shift...it would rev high and whirrr like you said. Check that...sorry i don't know the techinical term for this tube, but it has to be kept clear and open for the tranny to shift.
