KSB5WH4 KitchenAid Blender - Instructions

Followed your instructional video . Prayed off the drive coupler with screwdriver cleaned off the threads put the new one .It took 10min or less very easy

Working in a 360 degree circle with a screwdriver around the bottom of the drive coupling let the old coupling unscrew with little or no effort, and the installation of the new coupling simply screwed onto the drive shaft. The instructions that came with the part describes this method and it worked beautifully.

KitchenAid Blender drive coupling. Your instructions were good but incomplete.
When you pry off the old coupling you need to inform customer that the rubber portion of the coupling may come off leaving the metal portion on. When this happen, you need to say, “You could still pry off the metal portion”. This could be done without the fear of damaging the threaded shaft.
Or
The best thing to do is to provide the tool that will fit on the drive shaft. Then you could turn the coupling clockwise for removal. Then the need to “remove any metal shavings” would not be required.
I made my tool out of an open-end wrench, to work in the replacement.
Jerry Lakota

Exactly as the video showed was the best and easiest way 3 minutes max.