A500 and A518 Parasitic loss

Let me get this right..When the A500/A518 engages into overdrive. Everything in the front main case is no longer engaged ? WOW, did not know this!
So from what you said a 904 and a A500 should have about the same parasitic loss :)

Not quite what I meant.
I meant when in OD everything up front in the A500 trans is exactly like it is in third in the 904, but the power flow goes through another planetary set when OD is engaged.
So parasitic loss from the 904 to the A500 would really only be from spinning the OD section.
I'm thinking the difference is super minimal if any.
So yes, I think they are really close.