well since the original poster has not listed if he ever solved the problem I figured I would. I was having the same problem and replaced the motor mount (lower) and zzp polys up top... problem is still there only when the car is cold. I did not change my trans mount because it looked in decent shape compared to my motor mount. If anyone can figure out why it does this I would really appreciate. I always reverse into spots if im going to be parked a while because I HATE hearing that noise.... its painful