I do have a Hayden cooler that came with the 07 but I did not plan on using it. I had the ZZP transmission in the 04 and never had heat issues with the Transmission. I never seen it go above 185 degrees. It had their aluminum pan but i doubt that made too much of a difference. I will pay close attention to this one when it arrives. I just don't like the idea of cutting into the trans lines for the cooler. I know they sell stand alone coolers but those are way too expensive. Thanks for the heads up.