So I recently purchased the Xterra in my sig. Online there are many issues with the radiators leaking antifreeze into the Atf. Most recommend closing the loop in the radiator and only using the air cooled trans cooler. I did this and now I am having second thoughts on how wise this may be ( thanks BITOG). Will this cool sufficiently? My concern is the summer time temps. Am i being a typical BITOG introverted paranoid vehicle owner or are my concerns valid? Thanks for the thoughts.