I've had some experiences with ZF 4hp transmissions going into limp mode with old fluid. If the fluid was changed at the first signs of limp mode it could continue it's life happily, but if the owner waited chances diminished. I also dealt with aisins that didn't give any symptoms until it was too late.
The ZF had lifetime fluid in it, but symptoms typically occured around 70k miles. The Aisins went much longer, 120k or more, but as said above when you noticed it was too late.
You have a Chrysler, so yet another transmission and possibly different reaction to new fluid. I would however say new fluid of the correct specification never hurts anything, except your wallet. But then so does trans failure due to inaction.