It seems that every transfer case in the world is filled the same way: pump in fluid until it starts flowing out of the fill plug hole. Except for some reason the procedure is different for the MP2010 used for Quadra-Trac I. According to the service manual, it should be filled to within 1 to 1.5 inches from the fill opening. It explains you should make a dipstick by bending a metal rod 90 degrees 1.5 inches from the end, and use this to check the level. I did this, and what is strange is that you can't fit the dipstick in the vertical "down" position but you have to rotate it toward the main body of the transfer case (7-8 o'clock position). In any case, I have it filled about an inch below the fill plug. I drained it cold but it only took half a pint to get this level, which is half its capacity. This is a very simple transfer case so I suppose it doesn't need much fluid, but that seemed like too little. I bet if I filled it to the fill plug I would get almost a full pint.
Anyone have any experience with this? Should I trust the service manual?