Transfer case worries

[silver 07 ready for mud]

I changed my transfer case fluid for the first time today and it looked pretty bad black with a brown tint, and I got less than half a quart out and put about 1.5 quarts back in to fill. How worried should i be about this and what kinda problems could this lead to?

 

[ridenby]

Change again,soon,get any junk out. Good to go for awhile,10,15000m.