I changed the gear lube after the F1 GP.
The lube looks like a mix of gear lube and never-seize

Dark gray with a silvery sheen to it.
The sludge in the sump around the drain was thick with a lot of very fine magnetic metal flake. The good thing is I couldn’t feel any chunks or large particles. A magnet did not pickup any chunks and none washed out with the fluid.
I don't think i need a fortune teller for this one.
Now if i could just afford to do all i should do while I when I drop the the engine and tranny.