Originally Posted By: Oilgal
Here is a perfect example. Do you know what they did, for ATX cooling, in the second generation Town&Country/Caravan/Voyager minivan series 1992-1995? They routed ATF from the ATX, to a "cooler" inside the drivers side radiator end tank, then back to the ATX. That meant that your ATF was never cooler than the engine radiator coolant.
You do realize that just about ALL auto manufacturers use transmission coolers like that right? They are very efficient and do an excellent job cooling down transmissions. Not only do they cool down the fluid, they help the transmission get up to proper operating temperature faster in cold weather by using the engine's hot coolant to heat the transmission fluid. Yes, of course heat kills transmissions, but they also have a proper operating temperature and they shouldn't be too cool. The cooler built into the radiator does an excellent job of keeping the fluid cool, while still keeping it at the proper operating temperature.