From: kludge@panix.com   
      
   Woong Sinh   wrote:   
   >I change diff oil after a few years. It is black, and the stuff I put in   
   >is a nice clear blue color.   
   >It is not getting combustion blowby as in engine oil.   
   >BTW is rear drive, not limited slip. And is not one of those V8 cars   
   >with stage 3 tune, 500 kW on the dyno, so shouldn't be overheating.   
      
   It's all metal oxides and sulfides building up in solution.  Feel those   
   gears after 200,000 miles and notice how sharp the tips are and thin the   
   teeth are?  The metal that used to be on there is now in solution in the   
   fluid.   
   --scott   
   --   
   "C'est un Nagra. C'est suisse, et tres, tres precis."   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)