Correct me if I am wrong, but I assumed you were doing a change on a C14, so with that said, I don't see anything "wrong" with the clear quart you originally got; It was SAE 80/90, and marked as noted to meet GL4 and GL5 applications.. perfectly fine... as for the friction modifiers, I can't say that is a bad thing either, as in this gearcase, it's just gears meshing.. not like a friction modifier will effect that in a detrimental way... like if there were actually friction plates in the drive box (like some "limited slip" domestic differentials have, in the automotive field)...
I also caution, as Jim did, not to over fill.. but stop where the fluid touches the lower threads at the fill hole, and NEVER spin/rotate the tire/wheel while doing the fill... it will cause an over filled condition, as the lube sticks to the gears, and then drains back down.. this will ruin the inner big seal, and also the outer bearing seal on that gear case... and make a real mess... I only mention this as a backup reminder, when people are doing a fluid replacement, that are not aware of the outcome.