Differential oil

[achoeypatkul@hqfaus01.unicef.org (Amnat Choeypatkul)]

     >Date: Thu, 9 Oct 1997 22:09:14 -0800 
     >From: frankbauer@thevine.net
     >Subject: Differential oil
     
     >17mm hex tool.
     >make sure you open the filler first to make sure you can refill before
     >draining it!
     
     Hi Q-lister/Frank,
     
     Can some one pls let me know where is the diff. drain plug on '89-90 
     non-q.  (I try to change the diff. oil, but couldn't find the drain 
     plug...duhh!  Well...I found only the re-fill plug--on the left side.)  
     Also, pls let me know what type/brand of the diff. oil you guys are 
     using.  (My Audi Owner Manual just says "SAE90".  Can I use a regular 
     "Castrol--Hypiod/10-90SW/for Limited Slip"?  Is it bad/good for the my 
     diff?) 
     
     Many thanks,
     Nat
     '89-90 (70+K miles)
     
     Internet: achoeypatkul@unicef.org