I cannot find the pictures online right now (when I do I need to save them because I always have this problem) but your pictures are a deadringer for the wear a pair of our tough boxes showed in 09 as a result of the assemblers not putting in any grease.
What type of grease are you using?
EDIT: Here is the appearance of a completely messed up gearbox, no grease for an entire build season.
Set of photos