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Differential Installed

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After the backlash is set, the diff is removed one last time for the installation of a set of O-rings, a crucial part of an ARB installation, as one nick or cut to these O-rings and you'll have a leak. While the diff is out for the installation of the O-rings, it's time to drill and tap the housing for the bulkhead fitting that allows air to pass from the flexible blue line from the pump to the copper line on the diff. That done, it's time to button up the front, reinstall the axles, brakes, and wheels and move to the rear 10.25-inch Ford axle.