Trans cooler install

[fulltimerart]

I have a 6 row trans cooler ordered and I want to install it in my 98 Ram 1500 with 2 wheel drive so the trans fluid goes thru the radiator cooler first and then the new cooler. Which cooler line would I remove from the radiator to set it up this way? I have looked thru the forum but have not seen this topic but I could have missed it too! Thanks for your help, Art

 

[Different Drummer]

If all other resources fail, perhaps you could get everything up to operating Temp. and feel both lines. Hopefully one would be noticeably warmer than the other. I would surmise the hotter one to be the input from the Trans. to the radiator.