Is a transmission cooler part of the radiator?
Is a transmission cooler part of the radiator? The cooler for the automatic transmissions are placed inside the radiator, the reason behind this is the antifreeze provides the perfect environment. It warms the transmission up with it's cold and keeps it from getting too hot in extreme heat. What fluid goes into a transmission cooler? The transmission cooler is as you know the source of your problem. Transmissions use oil to lubricate but also to cool the transmission. The oil gets hot 175 degrees F, especially when the vehicle is working hard like hauling a trailer or driving at highway...