Just a quick video showing you one way to get a Rear Disc off when it is rusted to the axle. This works in many occasions but may not work when there is extreme rust or corrosion. This is a general-vehicle video.
How to repair, install, fix, change or replace a broken, damaged, faded, worn or faulty turn signal stalk, high beam and wiper swiftch on 08 Subaru Outback