How do you all do it!!! Today was my first time driving 55+ with my new Diesel and I swear it sounds like engine is gonna blow!!!! I'm seroiusly thinking of a doing a TH400 to 700R4 conversion. Do i just need to get used to it. will the truck be fine. It chugs along EASILY at 60-65, its just teh sound of the engine about blow that worries me LOL.