[Mgs] How often to change fluids

[WSpohn4 at aol.com]

In a message dated 01/05/2011 12:53:37 P.M. Pacific Daylight Time,  
saidel at camden.rutgers.edu writes:

I don't  know about changing the fluid in the tranny.  How often should   
that fluid be changed? And what should I use, SAE 90 weight is one   
that I read about.




Change it every 20 years and use 30 wt. engine oil.
 
Bill