[Mgs] How often to change fluids

[saidel at camden.rutgers.edu (saidel at camden.rutgers.edu)]

Hi all,

    I adhere to changing the oil and filter of my B every year, and  
maybe the brake fluid every 2 years.

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.

Bill Saidel
'76B
BMCSNJ