I'm not up to speed on 3/4 ton rears but unless there are nuts or bolts on the front of the housing then it is a rear loader and the entire center carrier section or what is commonly called the pumpkin is not removable. Way back when Chevy used a torque tube rear they did have a stamped steel rear cover and the center carrier section was removable from the front
One of the truck enthusiasts may be able to give you a more specific answer.
