Dark LSD Fluid

I just installed a CTR trans with a 98+ specs ITR final drive with the stock LSD. I drained all the fluid and replaced all the seals before the install. After installation, i used OEM honda MTF. After driving with the fluid for about 3000 miles, i changed it out just to kinda flush it since i figured the trans was probably sitting up in japan. The fluid was really black though. It didnt smell burnt, but was way darker than i have ever seen come out of a stock honda trans. I was wondering if this is normal for a LSD trans. Don't they use the clutch type for the lsd? Anyhow, any help is appreciated.

Oh and another thing. How could i tell if this is a helical or clutch type lsd. because if it is the clutch type, then the dark fluid might make sense right? I bought it off ebay from japan, so i am not sure if it still has the stock lsd esp since they already had it apart to put in the final drive from an ITR. I took it apart and everything looked clean inside, but didnt think to look at the lsd.