No locking diffs. Not sure about whether the gear ratio is stock or not. The torque converter locks it into a 1 to 1, but not sure about the other gears.
Lifestyle changes are forcing me to sell my favorite toy: my 1991 FJ80 Land Cruiser diesel conversion. I don't like it, as she's one of a kind. I am currently in Wisconsin, but will be driving the truck to Colorado to spend a couple of weeks with family over Christmas and could show it to people...