About ten years ago I installed a large stacked plate axillary transmission cooler in front of the radiator and in line with the stock radiator cooler. THEN the other day I finally realized that I installed it the wrong way. The transmission fluid flows into the external cooler first then the radiator cooler. Now my question is should I change it so that the fluid goes into the cooler in the radiator first and then the external cooler or leave it the way it is? thanks Dan..