I live in PA and its hot here, very hot
My trans runs at 190 MAX which is pefect, running a trans at 140 to 150 in not good.
Now with a verter in the car and over 220 temps then YES a trans cooler is a must.
I will see how mine runs once I add the Pro-torque 2800 to my car then make a decision on a trans cooler..
Your kit looks very nice