I have heard it is about 20 degrees as well. Any little bit you can cool your tranny fluid the longer your tranny will last. I would recommend a B&M stacked plate design tranny cooler. Get the biggest one you can. Summit Racing has a nice big one for $50 and it comes with all necessary hardware to hook it up. Very straight forward install that shouldnt take longer than 30 minutes. Something no TR should be without!