Some people think that an automatic transmission system is so sophisticated and works well under pressure that you don't need to service it much, if at all. Yet this is a very shortsighted view, as even though these are certainly well-engineered systems, they still have to deal with wear and tear. In fact, it may not be sufficient to drain and refill, and you may need to take additional steps if you want to avoid long-term issues.
Oil coolers are vehicle parts that are designed to help with keeping oil cool. If you don't know much about cars or commercial trucks, then you may have not heard of an oil cooler. There is also a good chance that the vehicle that you own right now does not have one, although it's certainly possible that it does. If you'd like to be a little more educated about the different vehicle parts that keep vehicles up and running, then you may want to educate yourself about oil coolers.