I have a 2012 Durango with the V6. I've had this intermittent issue with the transmission. When I start it up and put it in gear, the rpm's will drop and you can feel it shift in gear but then I have to get it up to 2000 - 2500 rpm's to get it to move. Sometimes when I put it back in park, shut it down, and then start it back up it will work just fine. Has anyone else had this issue or know what could be causing this?