Rear axle, Just like a samurai pull the axles unbolt the 3rd
Front, disconnect the left CV to axle flange, unbolt the aluminum axle housing from the frame, let it drop a bit with a pry bar or something pry out the right CV shaft, pry out the left axle stub, unbolt 3rd
generally speaking they should be 4.62 gears, but if it is a calif model it could be 4.30? I know some of the NY boys ran into one of these rare but it happens. count the teeth and check the ratio to be sure.