No it is not,the 1998 and up transmissions do not go out and those transmision shops you called are full of BS.The transmissions sit on the shelf at most yards.Does the service engine light come on?Check the condition of the fluid too,should be pink and not smell.It could be one of the speed sensors going out and that is only common problem with those transmissions.Make sure the speedometer works,it has to work when shifting it.Get it scaned for codes first.I have never seen a 1998 and up transmission go out.Another thing,use the recomended Mopar ATF+4 fluid only.Most parts stores now sell it instead of going to the dealer for it.I know Carquest is one that sells it