Now, are you going to deliberately eliminate it from your gear lubricants?.
Moly... not unless everyone suggested it for some specific reason. Schaeffer oil has a lot of moly in it and I had thought the GL5 by definition had friction modifiers in it.
I didn't know if there was a time and reason -not- to use it; other than wet clutches etc. That was the main reason for the question... and the misunderstanding of the first final drive oil change...