Hi,
I have a 2016 manual BRZ. I have just started to change the gearbox oil and now have a problem.
Instead of removing the actual drain plug I removed the little plug next to it
There was no sealing washer and looking online at parts diagram there is a little ball above the plug , nothing came out other than oil, no ball, no sealing washer, nothing.
Do I just refit the plug as is or should I fit a crush washer (I have one that would fit)
Library image below, blue arrow pointing to the little plug.