I just bought a very nice black 2006 GXP. I've seen where people are saying it's absolutely necessary to get a transmission cooler. My question is: what other mods need to be done? Does anyone have any insight on the DOD setup. I heard someone say there is a way to tune the car so it wouldn't use it. Is that something I need to do? I want the car to last. It has 65,000 miles on it now. Does anyone know of any shops in the Indianapolis area that are good with tuning cars? Any help would be greatly appreciated.