Modern automatic transmissions will not switch from forward gears to reverse abruptly. They even won't engage a lower gear until your speed is low enough so th

Modern automatic transmissions will not switch from forward gears to reverse abruptly. They even won't engage a lower gear until your speed is low enough so the engine doesn't over-rev. Even virtually all manual transmissions have interlocks preventing an accidental shift into reverse (though this is a very difficult mistake on a 6-speed).