Ahh yes the wonders of a Chrystler Trans. For some reason they have a tendincy to suck ass. but it should be under warranty, make sure you didn't get a lemon then you need to trade the entire car in but under 6 months. If you wondering if you got a lemon just google lemon and liberty, you'll find some friggin horror stories that will make your problem sound like a walk in the park.
the part that gets me is, we know they're ****** *****, they have to know it ***** after so many years of people complaining about it, and with all the loss of business to the Toyotas, Hondas, and Subarus... you'd think someone might say "Hey we're giving ****** tranmisions to every car we make, maybe we should change that." but nope, they just keep handing em out and we keep sending em' back.