New to forum.

4r70w wasn't shifting. Speed sensor (oss) was not reading. Tested wiring and sensor and readings were within spec. Removed sensor and took picture inside of port and was expecting to see ring gear but instead saw this and am unsure of what I'm looking at (see pic). Is this normal?

 

Something has changed with the output ring gear (reluctor). Pretty sure trans has to be opened up to replace.