blykins,
I am not sure about your differential as we use the Power-Lock differential, but...
The differentials are supposed to be tight, but two guys can move the tires opposite of each other without grunting too much. I am not sure what that translates to in foot pounds of torque, but I have done it several times without bustin' a vein. Just grab the wheel and crank. You shouldn't have to strain.
I am not sure if this helps...
David
