If the problem with your Performa electric dryer is that is making clanking noises, and the drum seems to be out of place with a gap between the drum and that back panel. The problem could be worn out drum rollers.
These washers use two drum support rollers on the back drum support panel.
These rollers have a metal bushing on the center of the rollers. The metal in the bushings is a softer metal than the metal on the rollers shaft. The purpose of this is for the bushings on the rollers to wear out instead of wearing the shafts.
When the shafts eat all the metal on the rollers bushings, the rollers start to ride on the plastic and makes a lot of noises.
To see how to check & replace the drum rollers in a Performa electric dryer, view the video below
Below are the links to the parts needed for this repair.