What is the "jerk" supposed to feel like when you shift the car from park or neutral to any other gear? I'm just wondering because I've never driven another Grand Prix and have nothing to compare my shift quality to. Synthetic Dex 6 was put in the transmission about 1500 miles ago, and the shift from park to reverse has seemed to get somewhat rougher, especially when cold. I';m kind of OCD about my cars like this. If this could potentially be a problem, I'm going to swap the dex 6 out with dex 3.