9. Though Hi 9 originally designed its axle for circle-track racing, the current owners of Hi 9 realized that the axle is perfect for the off-road market since it moves the pinion up more than an inch higher than a high-pinion Dana 60. What makes these third members unique is that custom reverse-cut gears were made specifically for Hi 9 in America by Richmond Gear, and yet it can be bolted into any standard Ford 9-inch housing. In addition, two thrust blocks (aka load bolts) are added so that their tips are a miniscule distance from the back of the ring gear. In the unlikely event that the ring gear should deflect under severe load, these will keep it from flexing.