On most automatic transmissions you can hold out your hand with your fingers spread, the space between park and reverse should be like the space between your thumb and index finger.The spacing between N, D, D1, Lo is the same. The exception was on the early Ford C 6, the spacing between all the positions was the same. A few people got killed when they thought they had the trans lever in park but they were in the space between park and reverse, get out with the engine running. emergency brake not set, bump shift lever,it would move into reverse . the car would back up running over you.