The ring gear is installed on the Air Locker with the supplied ring gear bolts. Some gearsets use left-hand thread bolts, so be careful to check. The ring gear should be cleaned and all holes checked before dropping it on the carrier, then the bolts should be torqued to spec with Loctite. Installing the ring gear may require soft taps from a bronze, aluminum, or rubber hammer. The ring gear can also be heated slightly so that it expands and more easily drops on the carrier.