I hit 231 towing yesterday with the coolant at 221, tranny hit the highest I have seen since the tranny pan and tuning, 210.
Approx. 18000# fiver, the most crap I have had in it plus fuel and water.
104 degrees going over a pretty steep pass in Northern CA. Altamont pass on 580 if you want to see it.
After the pass everything cooled right back down.
I usually see in the 213-220 range for the oil, 200-210 for coolant and 180 for the tranny. That is towing the above. Unloaded it is a little lower but not much.
I have found with my truck tune doesnt really matter on the temps, as long as the EGT's are through the roof for a long period of time. It is your right foot and rpm. Keep on the floor and the rpm high for a while and the temps will go up.