Simso - You mentioned when you checked your transmission fluid level it was at the bottom of the "drain hole". Did you mean the bottom of the fill plug hole, located on the side of the main case???
If in fact your checking the fluid level from the side of main case fill hole, and the fluid is even with the bottom of the hole, it's exactly were it's supposed to be and you have all the lube you need in there and haven't had any migrate anywhere else.
Perhaps you could post some pictures of your 3 speed and the "hole" you are getting you fluid level from so we can offer better answers to your question please?
