Your TCM may need flashing, but the first thing you need to do is have the codes run on it and see what shows up. As far as your old ones go, did you service the transmissions yourself or trust someone else to do it? If you trusted someone else, odds are very good that they didn't use the proper fluid in them. ATF+4 ONLY in Mopar transmissions. I don't care what any shop tells you, Dexron plus an additive is not the same thing and will destroy your transmission. If that's what's going on, then you need to change it yourself, or find a shop that will listen to you.