Yes...going backwards will have little to no air flow through the main radiator,
nor external ATF cooler
The engine fan and any aux fans 'help' a little, but the amounts of heat generated
maneuvering back and forth like that will elevate the AFT way up there
The TC will be at stall a lot with little to no air flow to cool the radiators.
Plus high throttle setting...worse if dirt, gravel, potholes, incline, etc
Been there done that and always let it rest a bit while holding the engine
in N at a higher RPM to get the fan to cool things down.
There will just be days when it's NOT working...
Love drive through sites !!!