The gearing in the 2016 I have seems fine to run up to 35's. I have a 16.
The reason to re-gear would be if you want to add a front locker. The 2016+ comes with "thick gears", so the front ARB locker will not fit. The front locker needs a thin gear set to fit inside the differential. The rear ARB locker fits with both the thick and thin gear sets, but not the front.
There maybe a front locker that fits without re-gearing to a thin gear set, but I have not found it.
The reason to re-gear would be if you want to add a front locker. The 2016+ comes with "thick gears", so the front ARB locker will not fit. The front locker needs a thin gear set to fit inside the differential. The rear ARB locker fits with both the thick and thin gear sets, but not the front.
There maybe a front locker that fits without re-gearing to a thin gear set, but I have not found it.
