I haven't looked into these newer trucks too much. How does (or would) the trans hold up compared the previous 4L60Es? If it's pretty much the same, I'd be looking at beefin' up the trans BEFORE I do anything else... but, hey... I only broke my first trans once, and the second trans twice. Truck's still sittin' in the driveway with only 1st & 2nd gear to plant the power to the rear axle.