Transmission cooler help

I have a B&M cooler in front of my radiator. Car is my 64 Sport Fury with a 26 inch radiator with a shroud, and a Summit SS 18 inch fan. The trans cooler is about 3 inches in front of the radiator. Also I ran the fluid lines through the radiator first, then the cooler. No overheating issues. Runs at 180. Rises to 190 sitting at a light. Not sure what your combo is, but maybe the cooling system is marginal, and this change affected the temp. As was said, mounting to the radiator could cause the tubes to wear through. I would just move the cooler away from the radiator, and maybe route it through the radiator.