Chrysler,is this a symptom of a bad range sensor?

When I put my car in Reverse, there are no backup lights. Car goes into gear, and moves backward, goes into neutral, and its on a slight hill so it rolls forward, goes back into reverse and backs up. Neutral, Reverse, neutral, reverse, etc. Talked to several transmission mechanics and Chrysler dealer just over the phone, and they said it is not a range sensor symptom. However, found a guy with similar symptoms and replacing hid range sensor fixed his car. Also found literature online that says this is a symptom of a bad range sensor. So some say it is, and some say it isn't. Help!