When properly installed, a transmission oil cooler helps to add extra cooling capacity and protection to your car’s cooling system. It does not affect any other component of your car as its only role is to cool the transmission fluid. If you drive a car with an automatic transmission, you’ll be able to install one as long as there’s room for it. Coolers are not specifically designed for any make or model. An external cooler is recommended if you tow heavy loads, do a lot of stop and go driving, live in a hot climate, or have a vehicle that overheats often. Coolers operate anytime your engine is running, so fluid is constantly cooled while you are driving.