62TE 2012 Caravan trans thunk

First if you think the trans had any service done to it then bet that the incorrect fluid was used in it. Atf+4 only in the Chrysler trans. Most non dealer places like to use a generic with an additive that they say works just as well. It doesn't.
Also the trans "learns" learns your driving style and adapts shift points so disconnect the battery fo about 20 minutes, reconnect and see if it gets better in the next 100 miles or so.