Heavy loads are no issue for your Powerstroke when equipped with the Mishimoto Transmission Cooler. The stock 6.0L and 7.3L  Powerstroke transmission cooler does an ample job of keeping temperatures down, but as the loads increase, so do transmission temps. The 37-row Mishimoto stacked plate cooler provides a larger surface area over both of the stock coolers. Core volume is increased by a whopping 21%, and fluid capacity is increased by 1/3 qt. 

With the Mishimoto transmission cooler, high transmission fluid temperatures will be the least of your worries. The increased size of this 6.0 Style transmission cooler provides a proven 10+°F drop in transmission fluid temperature! No modifications are necessary for installation.