2005-2010 Mustang GT Tech
Wanting to put aftermarget gearing in my 07 gt auto. I know there's 3.73, 3.90, 4.10 and 4.56 gear sizes. What the the bonus's and drawbacks of each gear size? Like MPG(rpm), top speed losses, gains on launch, etc? Anyone ever used the 3.90 gears? A buddy of mine put them into his 04 GT and he...