When I had a t-350 I was just going to use the a/c condenser for my transmission cooler, then found out that too cool is just as bad as too hot. So when my transmission went belly up I went to a stick, no cooler needed

If I still had an auto, I'd use the factory radiator cooler AND a small external cooler. I like the the tube and fin design, because the plate system MUST be REPLACED if your trans fails. They CANNOT be cleaned and reused unlike the tube and fin design...