C4 tranny cooler is not working

[Stang_ROTY]

I'm using a TCI tranny cooler that I bought when I was at Dynamic picking up the tranny. When I removed the upper coolant line from the radiator it was bone dry. The lower line was filled with fluid. This was the line that my Uncle had pushing out from the cooler. I think that if I eliminate the radiator version of a cooler and use the trans cooler only than I'll be all set. Also, Dynamic told me that tranny fluid should be between 180-210 degrees. Anything over that is not good. Obviously, if my tranny was hot enough to transfer the heat through the metal mounting plate into the Hurst shifter it was over 210 degrees. Probably closer to 300. I think I should drain the tranny and re-fill with the TCI fluid. It's supposed to cool the tranny by 30 degrees and it's coming in along with the tranny temp gauge today. What do you guys think?