If I ever have to pull the tranny again, assuming its not from the diff, I am gonna put a tortion in. So how could they have made the gears so that they would last?

ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap