15. What we thought was going to be one of the biggest hurdles in this project turned out to be one of the easiest. The big-bearing 9-inch housing ends happen to be identical to the ends on the Ford 8.8 were running, so we were able to re-use all of the brake components from our existing 8.8 rear axle (minus the wheel spacer). The backing plates, caliper stands, and rotors literally unbolted from the old housing and bolted on the new one. Even parking brake functionality is maintained, and replacement parts are readily available.