Interesting thought: with older transmissions that we wanted to keep 160-180 max, it required both the radiator loop and an auxiliary cooler. the internal loop alone might do that under most conditions until the radiator temp creeps up over 160+, in which case the auxiliary cooler was required. conversely, if the transmission starts at 200 and ideally needs to stay under 210F, that same coolant loop ends up being far more useful over most of the operating range.
I know the 10r80 I’ve got, even worked hard with a travel trailer on some of the steepest climbs I had it on, without the HD package, without an extra cooler, was extremely well-controlled. I don’t think I saw it ever go over 220 and it cooled rapidly as soon as the terrain changed. and of course, the AC was running too.
I know the 10r80 I’ve got, even worked hard with a travel trailer on some of the steepest climbs I had it on, without the HD package, without an extra cooler, was extremely well-controlled. I don’t think I saw it ever go over 220 and it cooled rapidly as soon as the terrain changed. and of course, the AC was running too.