Next, mate the axle mounts to the axle; their exact position at this point isn't critical. As the mounts are mated, slide two U-bolts into place on each axle mount. Be careful not to pinch the brake lines. Thread the supplied Nylok nuts onto the U-bolts with washers under each nut. Leave the brackets slightly loose so they can pivot on the axle tubes. Never weld the axle mounts to the axle, which would cause the axle to warp.