What 833 gear/diff lube?

i was kinda sorta down that road earlier and i am a younging that has no clue about teh smother brothers but lots of research from this board and many other mopar boards.

I went to the local mopar dealer for the friction additive for the rear end and dumped that in and then added gear oil for the rear which i believe was 75w90
i also used the 75w90 for the a833, but i have only drove the car for a total of 2 miles