Crossflow radiator, drivers side top inlet from hot thermostat. Bottom outlet passenger side to water pump cooled water. OEM routes transmission fluid lines first to the bottom passenger side of the in radiator trans fluid cooler. So hot trans fluid goes to the cooler side of the radiator first, which would actually heat the water going to the pump and cool the trans fluid. Now as the trans fluid flows upward to the exit of the cooler it encounters hotter water, re-heating the trans fluid before exiting back to the trans? Seems to me that this would cause higher transmission fluid temps. So what is the reason for routing the lines this way? Seems to me you would be sending fluid back to the transmission at the temp the thermostat is, 180 degrees or so? Why not switch the trans lines to the cooler? Sending fluid back at the temp of the exit from the radiator to the water pump. Something less than 180 deg.