So I read this thread, I disagree with a few things here. First of all, the picture shows the cooler mounted with IN line on top OUT on bottom, supposed to be opposite, so the cooler can get completely filled (stacked coolers) for best results in/out has to point UP, and if mounted sideways IN should be bottom(manufacture setting). Also a member says to put the aftermarket cooler in line after the stock (radiator) cooler, it supposed to go inline before the radiator, simply because the radiator cools it already, then the aftermarket one cools it even more, and if we talking winter time here, the fluid going back to transmission is COLD, and supposed to be around above 160 degrees. Otherwise if it's too cold, the radiator will warm it up