727 cooler temperature

Hi, I have a new to me 66 dart with a 440. It has a "New a year ago" transmission, I assume is a 727. I have driven it 100-200 miles since I have owned it and never noticed any transmission problems. The fluid is red and didn't smell burnt as of purchase date.

Yesterday I was looking around the car, trying to figure out how to get a functional shroud on the fan when I noticed that the tranny cooler and lines were very cool. The car had been driven a few miles a little bit before this and the radiator was still quite hot.

Is this normal?
If not, what could cause a lack of tranny fluid to the cooler?