Hey guys purchased an os giken gearbox without transfer case, brought it from a guy by the name of Phil rido from Brisbane, how would I know if it's got a os giken gearset like it was advertised, it has a 5 speed gearset in there, which has never been used, how can I tell from the exterior of the gearbox that it has it or do I need it inspected? It still has the fresh aqua colour oil fresh, any help is required and appreciated thank you guys