More on this Super 55, I went to drain all of the fluids to start fresh since its new to me.  

The hydraulic fluid in the hyd. system was thick, milky and close to orange.  Like vomit.  Anyway, I drained that and replaced but then I went to the tranny/diff oil.

The tranny/diff fluid was so black and thick.  I drained about 0.5 quart in about 20 minutes from one of the drains and stopped working with it.  It was super low/empty.  So I wont run it, obviously, in a 20 quart reservoir there is a sever shortage.  

BUT how do I clean that crap out of there without doing any further damage?  Should I add a full amount in the system and plan to change it all over again soon?  Someone at work suggested putting diesel in there and running it around the yard at idle for a while and draining that out and putting new fluids in.  

Whats the best plan of attack here?

STU