I have a separate cooler mounted in front of the intercooler down low. They disconnected the cooler inside the radiator and blocked off the openings in the radiator to prevent problems.
I don't have a means of measuring my ATF temp yet, have been wondering how I'd do it since the data isn't available in the ECU it means (for my 2009 STX) I need to add a gauge and sender myself to the gearbox.
I was goin to put in a bigger trany cooler in but its pretty big considering i thought it was the size of ya palm behind ya grill..