Not uncommon, but unpredictable, frustrating and potentially dangerous. I had all the parts, taken off on another project, but shipping would be prohibitive and I scrapped them
It happened to me. Passenger side caliper locked up. I went and got Pads, Calipers and Hoses. Changed the stuck side on site at the campground, then the other side when we got home. If you changed Hubs/Rotors you found out how tight those caliper bracket bolts are! I wasn't happy with the results and had the rotors re-surfaced ("turned") and much better. BUT...
The fix that blows all the fancy exotic fancy pads and rotors into the weeds is getting late model take-off parts from an outfit that converts Ford Vans to 4x4. I got a "full kit" which was both axles, the brakes, radius arms, and miscellaneous parts. So our 2002 has NEW 2012 rotors, calipers, pads (all much larger), axles, ball joints, bushings and latest generation of radius arms. I drew the job out, spreading over a couple weeks, but actual work was probably 2-1/2 days, by myself, in the driveway.
For this job, Ron, be sure bearings are packed, seals are good, and you changed hoses along with the calipers, pads, and apparently rotors.
