[Titan]

I know there's an equation somewhere that will tell you all that, I just can't remember what it is. At 80 mph, I'm running around 2900 rpms...not sure about the other speeds. I rarely ever used first gear, unless I'm on a hill or wanting to get going. I get 300+ miles to the tank, too, so I'm above 20mpg. However, I drive 70 miles/day on the interstate and my speedometer is a little off. It says I'm doing about 7-10 mph over what I'm actually going, so it throws off my odometer. You'll notice some difference, but nothing real big. My dad has 3.55 in his and I can tell a difference b/w the two, but it's minimal.