Yes I'm definitely familiar with the trans cooler on one side and oil cooler on the other. Like you say, catching all the different fluids is a bit of a challenge. My 6.0 also has the second cooler in front of the radiator.
I'm glad to hear that your transmission temp basically mirrors mine. I was a bit suspicious that after the radiator replace the temp would climb to 200 and basically just sit there no matter how hard I pushed it when towing. It almost seems like there is some kind of thermostat on the cooler line that is mostly closed during normal driving. But after reaching 200 it just opens wide and lets the fluid flow.
