6. This is how the left side (the right side is a mirror image) of the rear axlehousing looked before reassembly. When you remove the rear leaf springs, you must replace them with upper and lower control arms to hold the rear axle in place. On the bottom right (under the dual welded-on universal shock mounts) is the mount for the lower four-link bar (this mount is actually the factory lower shock mount that's been widened and gusseted) and on the far left you see the Air Ride Technologies upper four-link mount. The new custom air-spring pad resides in the middle.