Bought a new radiator. Not thinking from the last time I replaced it, I bought an auto version(built in tranny cooler). Now, I already have an external tranny cooler because the last time I replaced it (~8 years ago) I got a great deal on an all aluminum radiator with no internal one. I've read a few threads about people using tranny coolers (both internal and external) as oil coolers, so I have a few options. 1- Just keep the internal capped off. Don't mess with the external at all. 2- Run the internal as an oil cooler. Don't mess with the external at all. or 3- Run the internal as the tranny cooler. Use the external as an oil cooler. What do you guys think?