The one ton (95 if that's the one you're working on, this is the 1st gen section) should be held in with 4 bolts:
Remove the cotter pin and axle nut (1 1/6 nut I think or like 34mm)
Jack the truck up and take off the tire and caliper.
Remove the 4 bolts from the back of the hub and bearing.
Sometimes the bearing comes out with a few taps, sometimes it cost your first-born son.
After you get the bearing out the axle'l slide right out.