I have had the shutter since i purchase it. it jerks somtime while driving & i have taken it to dealer several times & they always say can't find anything.It also slows when air is turned on. One day i got into car to leave & was unable to move gear out of park, call dealer & was told right off bat that it was the belt inside gear shift. was told by tow truck driver that it is happening to all the Chrysler & dodge vehicles & they have been towing a lot with that same problem. A lot of people have told me chargers are not a good car & after 50000 miles transmission have to be replaced. Will never buy another chrysler or dodge vehicle.