Coolers work best when kept in the direct airflow. Mount it in front of the rad for the best results. Use the rad support and metal straps to mount it on the rad support, and not the plastic hold-downs to mount it through the rad. Using the straps and mounting it through the rad can lead to problems. Tru-cool are the best transmission coolers in the market IMHO. They are a true radiator design and the most efficient..