Not related to the gearbox, but a customer of ours has had his 08 GU into Nissan twice now for the turbo mainfold gasket, and we have replaced the hydraulic tensioner for him once, with Nissan also doing so. The same vehicle has also been through a set of hubs already (40,000km), and the owner considers dirt roads to be 4WDing... Nissan have been pretty good to him, but the vehicle has spendt more time on a tow truck than its' own wheels lately...