Car started to grind gears shifting from 5th to 6th and various other methods during higher RPM shifts.
Brought my 2013 limited BRZ into my local dealer and within 10 minutes a tech drove with me in the car, felt the issues, and ordered me a new trans.
While this sucks.. I'm glad I was able to get a warranty replacement so quickly and easily with no hassle whatsoever.
Here's hoping for better luck with the new one.
Edit: have 8k miles on the car