Wow, this is a lot of great information! I think first I have to find out exactly which transmission I have and what the drive ratio is. Was ther eonly 1 4spd option in '08? Second, I dont have a trans cooler that I'm aware of. I know this topic has been covered but would that be a good idea? As far as the tune is concerned, is there a good out of the box option or is this more of a custom thing? I guess my boat will be the next thing towed this summer, about #3500. I am looking at bigger boats closer to #5000 so it will be good to work on this issue.