Your going to get 10 million 3 hundred and 42 different answers...Just use a good name brand oil and mix it correctly...I use Klotz Benol...Everyone uses somethin different.
I use BELRAY in my tranny, I am a dumbass and should of used 10w30 Valvoline or similiar oil...Tranny holds almost 2 qt. I put in 2 qt myself..