Ok after chasing down a vibration I have had the driveshaft out about 69 times, spilling a few drops out most of the time.

Do you check the level to the bottom of the fill hole hot or cold??

I'm thinking cold, but want to make sure.

Cold will be just fine .
Mark .

cold will be fine just as long as its at the top hole.. what type of mechanical speedo adapter do you have? or is it electronic?