It jumps into gear and the RPMs jump up for a second. It is strange. It only happens when the car is cold and I just started it. I let the RPMs drop a little, then put it into reverse and the car jumps into reverse, then when I put it into drive the car jumps into drive, it almost lurches into drive, if I leave my foot on the brake it will try and jump forward. Is this normal? It doesn't do it if the car is warm.