I leased a 2014 Sahara Jeep Unlimited in June of 2014. I barely drive it and I use to go to the beach and back... I started it about a month ago and noticed a rattling when shifting from park to reverse. Eventually, it has progressed to a noticeable vibration when shifting to reverse! I called the dealership and they said they can see it in a month! I demanded that they see it this week. Does anyone have any answers or similar problem. I feel bad about it because the car is essentially new and I pay about $450 per month for it and it does this!? In the back of my mind I worry because I do not know how serious the issue is. I also am not sure if I'm liable for anything given I lease the vehicle?...