When I bought my car I was told the trans was rebuilt w/ a shift kit. The car sqwacked the tires in 2nd and third. One day when it shifted in to 2nd instead of sqwacking it shifted real smooth and mad a sqeeling sound and has been doing it since. Now I have tranny fluid leaking. I have not had a chance to get under there. Now the car no longer chirps em. The sound it makes when it shifts at high rpm sounds like a belt squeel. Could it be the vacuum modulator??Any ideas would be appreciated..