Thread: Centre diff lock

80 series have pretty robust drivetrains. So keeping the centre diff locked on Stewart Island type roads should be fine. It will make your turning circle a tad wider though. A centre diff when open just allows you to keep drive to all 4 wheels on tar seal. But lose traction and your 4WD becomes one wheel drive pretty quickly, until you lock up that centre diff.

Yes, low box gives you far more finesse at low speeds.