This is a complete tear down, clean and rebuild of a 1987 Grand Wagoneer Power Mirror Controller Switch. I was able to make the switch work again. The weak link is the center section which the adjusting knob is pressed into, this piece is made of a material that is brittle and over time and use cracks and breaks apart, rendering the adjusting knob useless because it is no longer attached. This might work for your controller switch or similar controller switches, it also might not.
I specifically did not use air tools, to show the process. A lot of people only have basic tools and this can be accomplished with standard tools. See List below. This is a 9 min time-lapse video of the 1 1/2 hrs it took to completely strip down and disassembly of a 2009 Chevy Full Floating 14B rear axle for my One (1) Ton Axle swap into my 2009 JKU.