Hi GAS-A-LOT,
If I recall correctly, none of the Toyota mini trucks were rated as 1/4 ton trucks. They were either 1/2, 3/4 or 1 ton trucks. And, I don't believe that any of the short bed trucks were rated above 1/2 ton.
I did read your other thread to see what you were thinking about doing with this truck. You should check with the California DMV about your plans to make a truck bed trailer. Some states will not allow you to use the truck's drive axle in a trailer build. They require you to replace it with a standard trailer axle.
There are some advantages to replacing the truck axle with a trailer axle.
1. The new axle can have the same lug pattern as the tow rig. This gives you rolling spares.
2. The new axle can be built in either a spring-under or spring-over configuration, depending on how you want it.
3. The new axle can be ordered with electric trailer brakes. You mentioned in the other thread that you wanted trailer brakes.
good Luck, Kevin