FJ 60 axles have a monster 9 1/2 inch diff, they're a tank. But they are for leaf springs. The FJ 80 axles are basically the same diff, with uprated axle shafts, and are set up for coil springs. A minitruck axle is a joke, and should never be set up for anything over a 33". Their are a lot of people running 35" tires on mini truck axles, but a yota weighs half of what a Rover weighs.