Um..... I don't remember the website, but there are a couple other mustang boards out there that have the ratios for the different trannys. As for the T5 and the T45, they have the same gearing, and it goes like this:
1st: 3.35
2nd: 1.99
3rd: 1.33
4th: 1.00
5th: 0.68
Reverse: 3.35
Hope this helps, if I can remember the website that the ratios are on, I'll post it.