Will the car slip behind the automatic?

It is normal to sneak back when the slope of D gear is large, which has no effect on the car. Because the automatic gear is only a computer-controlled natural forward or backward (reversing), it is different from the manual gear that is completely engaged by gears. When you lift your foot to kill, the D gear is insufficient because of the large slope, and the gear is adjusted by the slope power. When you increase the throttle (power increase), the forward power is greater than the reverse power of downhill, and the trend of automatic transmission will appear. In the future, if you stop and swipe your card, you will brake and kill the car by hand. When you start, you won't slip away. I believe you can control your car well.