Well I dont know what came in the trans originally whatever comes from the factory is what was in it. It never made it to 1000 miles

 

as I said I will not comment on your choice of oil, as each to his own. I did say that the problem started after you made the change

 

I would take the derby cover off and look for rubbing on the side of it, I don't know if you used the original screw, but if not, maybe the new screws are longer than the originals and rubbing against something inside..just a guess..