I ve been researching this as well .If you tow or drive in the mountains, a b&m or derâle or flex a lite, jegs with fan, also d erale aluminum with a fan also, installed in series will defiantly help keep the Atf fluid cooler extending the life of'the transmisiion. . é trailer has some options also amazon and such I am also leaning towards a laND cruiser setup also just haven't pulled the trigger yet.