I spent entirely way too much time trying to get one of these style extruders on my Ender 3. Maybe I picked a knock off without realizing it, maybe mine was just defective, I’m not entirely sure.
But it was ultimately the cause for my printer underextruding on certain layers. If you need a new extruder, go for something better than these cheap $20 ones and get an actually decent one.
But on the bright side, my printer is finally fixed! It feels nice to be able to get back into the hobby again.
The extenders on ender 3s are all sorts of trash, the bronze gear wears out pretty fast, tensioning issues, build quality.
How you have 100h on one is frankly a miracle. I have multiple ender3 s and I just immediately change out the extruder at this point.