Thanks guys.... I had the back-end of the car Jacked up too high for any fluid to drain into the back res. Let 'er down a bit and presto clean fluid was a-flowing to the back. Thanks for the prompt responses that got me thinking!
-Matt-

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Currently:
1972 350SL Euro 4spd
1973 BMW R75/5
1981 BMW R80GS
1995 FZJ80 with OM606 Conversion In Progress