The warranty basically says, as long as what ever needs fixin' was not affected by the aftermarket modifications,such as gearing or lifts, then it's no problem. So if my engine goes out, they will fix it no questions asked. After thinking it over, I think I'm just gunna save up for the 3.73's. I know I could get the 3.55's for a steal from cmdrjim, but I think that the 3.73's will be worth it in the long run (won't have to upgrade later on).