65 Dart Wagon Conversion to a Sedan Delivery

The trans cooler is in the bottom of the radiator. The engine's operating temperature is governed by the thermostat, located close to the top of the radiator. If you have a 180 degree T-stat, the coolant entering the top of the radiator will most likely be hotter than that. However, the coolant at the bottom of the radiator will be much cooler.