Before everyone gives me crap I did do a search about gears, I couldn't find a post about what I was looking for. I am new to the whole mustang thing and I am just trying to gain as much knowledge as possible. Anyway I just got an 01 with 35K on it. I already want to make it faster and its only been two weeks, its an auto so I was thinking about some 4.10's, I was just wondering will it make it slower up top from say like a 70 punch?