sorry. maybe stripped hub isnt what the problem is.
ill try to describe what im experiencing.

sometimes if im pounding up a hill or doing short caution skids i can feel something loose. it feels like the cranks move without the wheel stopping or moving (depending on if im skidding or pedaling hard)

its not a loose chain and i just replaced the whole crankset.

i though maybe (somehow) my cog was slipping.