The sct programer worked pretty good, you can do your shift points, shift pressure and firm up the line pressure, and for the engine you can pick your basic, fuel millage, towing, power, off road tunes. you can also adjust your speedo for larger tire or gear swaps. I really like mine. for what it is. Lets put it this way, its the beginners chip, when you start making better up grades, cold air intakes, exhaust systems, injectors, turbos than its time to get that out and sell it to the next guy.