Sablesurfer,
It's not that technical. Just big and heavy and greasy. You need to get into the wheel's bearings. Those hubs and drums are quite heavy and the bearings on a truck are huge. The rears are what is called a full float axle. That means that there is an axle bolted to the hub and once that comes off, the hub has a nut and big bearing that is lubed from the oil in the rear end. It makes a mess of gear oil when you take it apart. However, you may not need to mess with the axles. It is possible that the rear drum is just held in place by some machine screws and the drum fits over the lugs like you are accustomed to. You will need to soak them with some penetrating oil and possibly use an impact tool that you hit with a hammer to bust them loose.
If you do remove the rear bearings, make sure you grease them before reassembly. It takes time for oil to pump all the way out from the rear end to those axle bearings so they need lube until oil gets there.
All this and you haven't even started on the brakes yet!!! Good luck!!! Have fun...
