The final step was to bleed all four corners to not only purge all the old fluid but to eliminate the air in the system. If you're not in a hurry, gravity-bleeding one corner at a time is a good way to purge the air. We drilled the cap of an old water bottle to hold the hose and catch the old fluid. Be sure to properly dispose of the old fluid. We turn it in to the local hazardous waste roundup.