Chosen Solution
The inside rubber part of the blender that’s connected to the base not the blade (not sure what it’s called) came loose and won’t screw back on. It appears the treading is worn out. So far, I’ve only been able to find the rubber gear that you connect to the blade only. Any ideas?
Update (04/24/2018) Sorry about the photos. I’ve provided some more that should be clearer.
Marion Bee your image is a bit hard to see. If it is the external thread on the rotor it will be difficult to repair that but it’s possible by rethreading it. Your image looks like part of the gear is still on the shaft. Take another picture of the gear (picture #2) but this one from the underside. It is possible that ll you have to do is to replace that gear. You must however remove the leftover part form the thread end of the rotor first. Again, it will help if you can post well lit clear images of those parts with your question.
