With the 4.0 I would go 5.13 all day, with the diesel I have 2.0 TDI, I have all the torque I want with 4.56s (nv3550 / 35s)
Until you go offroad and you can't get it into the turbo because the rpms are too low.then gearing matters as much or more than a gasser. N/A diesels are turds