The leak seems to start there. No oil found above it. The boot and surrounding area was soaked. Peeled the boot back and it was wet inside.



Any ideas why that would happen?

It's possible I slightly overfilled it as only the front of the car was on stands.
Nothing comes out of the fill hole now when I remove the bolt with the car level.

I drove about 150 KM since the trans went in and then I noticed the drip. I'm pretty sure it wasn't leaking before.