I test drove a Saab 900 S the other day. It was automatic so everytime I switched it from drive to reverse, or something like that, and started moving the whole car would start shaking. It also did it sometimes when slowing done. The thing is that after driving for a little while, the rumbles got less worse and eventually almost stopped. I asked the car dealership about it and the assured me that it was normal. Is it normal or is there something wrong with the car. :?