Well there's your problem !

[69383RR]

call Jamie Passion, he'll tell you straight!

Well I talked to Jamie over at Passion and he told me that they have there own formulated Passon performance gear oil for A833 transmissions @ about a 50 weight . $9.00 a qt. I also called Brewer's Performance , these are the people that will put a complete 4 speed manual trans conversion kit together for you . They recommended 80,85 or 90 weight with a GL4 Classification.
I googled GL4 , found this very interesting article http://www.widman.biz/uploads/Transaxle_oil.pdf