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There are a pair of pins that hold the calipers in place. They need to be driven out from between the caliper and mounting bracket and the calipers will lift out. The pins (shown below) consist of a pair of metal blades with a rubber bushing between them. They are all one piece and should come out with a few taps from a mallet and a little compression to get past the cleats that keep them in place.
grey, FYI, somewhere before 1994 Ford switched to the caliper pin that has a bolt head on one end, the metal sleeve cylinder that goes around it, and it all fits through a rubber bellows boot. Same system that Ford used on its cars for eons. A much more maintenance-friendly design.
O/P, once you have removed the automatic hub, you should see an internal snap ring that is on the inside of the hub's cylindrical area, like "inside the pipe". IIRC, the snap ring is just a ways in from the outside edge. Years ago when I took the front end apart on my '94, I had a hell of a time getting those snap rings out!
A Haynes manual would help, usually decent pictures & explanations. I take those rings out with either a dental pick type tool & small screwdriver, or two small screwdrivers. They are hard to see, and to find, until you get one out & see how they work. Try to find the ends, there's about 1/4-3/8 " gap in the ring.
If that is true, Torky, it wasn't a cross/platform change. I've replaced brakes on plenty of 94'+ F-series 1/2 tons/Broncos that still used the drive pins.
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