All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
So Zieg, why do you want to change gear ratio's? What made you not want to tackle this now?
Nice! What trans do you have?
Have you considered a 700R4 or 4L80E instead?