Here are some numbers I worked for another forum. Figured it would have some appeal here too. These are for the 2011 GT version.
http://media.ford.com/images/10031/2011 ... _Specs.pdf is where the GT ratios and redline are from. Interestingly 5th gear is 1:1 not 4th gear.
Here are the effective ratios for a 2011 Mustang and 2006 GTO. Both cars have similar weight/power numbers. 4th gear is 1:1 on the GTO's T-56. Engine torque seems to be pretty similar to the LS2 with the numbers provided but there are an extra 500rpms to play with on the GT.
Final gear ratios (Diff gear * Trans gear)
Code:
Gear GT GTO
1 12.11 10.28
2 8.04 7.16
3 5.59 4.95
4 4.37 3.46
5 3.31 2.91
6 2.15 1.97
Stock tire rev/mile (Theoretical sizes the calculator used, real tires will be bigger)
GT - 737
GTO - 790
7% difference between them.
Corrected for Tire difference (Above GT numbers * .93)
Code:
Gear GT GTO
1 11.26 10.28
2 7.47 7.16
3 5.19 4.95
4 4.06 3.46
5 3.07 2.91
6 1.99 1.97
Top speed per gear (Low because of fake tire sizes)
Code:
Gear GT GTO
1 47 48
2 71 69
3 101 100
4 130 144
5 172 171
6 264 252
75MPH cruise RPM
GT - 1990
GTO - 1935
Shift speeds @ 2,000rpm
Code:
Gear GT GTO
1 13 15
2 20 21
3 29 31
4 37 44
5 49 53
6 75 78
http://www.grimmjeeper.com/gears.html is the site I used to get the numbers. Let me know if my math looks bad or overly fuzzy.