You need the dipstick A DRB scantool, and the chart to compare it with, the dipstick alone is like 150, plus you also need access to dealer connect, chrysler tech website for their service info. deal with the fact that you are not allowed to check your trans fluid.
These are supposed to be life time fill trans, because people drain them, put the wrong fluid in them, they blow up, and the Chrysler makes a crappy trans.