Usable to Cool Down Engine Oil, Transmission, and Rear-Differentials,Anodized for Durability and Protection. Track Use Potentially Reduces Oil Temperature up to 50°F,Helps Reducing Coolant Temperature,Extends Engine Life. The primary purpose of a transmission cooler is to keep the hydraulic fluid inside the transmission cool. A transmission cooler can help your transmission last longer. Composed of aluminum alloy casing, front and rear covers as well as copper core pipes, these oil coolers adopt outer fin design to strengthen overall cooling capacity. By being integrated into the cooling water circuit, water-cooled oil coolers use the water’s temperature to effectively manage lubricant heat levels., Manufacturer: DGOINGPI