Transmission time! Started by gutting the wrx case, cleaned half of it. Its not rust, its not corrosion, its not grease...its all of the above?
Decided to put the case pieces back together. Handling the case halves sucks!
They are sharp and awkward and its easy to damage the mating surface that will keep the oil in. Its looking like I will stick with the 3.9. I cant find a deal on a 4.11 tranny to steal parts from and id like to confirm that the internals are working before buying stuff for a used unit.