I bled the lower unit of all the old 90w and put in new Quicksilver 90w. Had to use a little air pressure to get the new 90w to start flowing out the lowers drain hole. Guess I'll take the fill line off the upper and squeeze tube lube in the drain hole to make sure the lower has proper lubrication.
Ayuh,.... The drives are drained by removin' the top, 'n bottom screw, 'n let it drain,....
Drives are filled by pumpin' new oil in through the bottom drain screw, til it runs out the top level screw,....
On a Gen.II, you can continue pumpin' til the bottle is to the full line,....
'n ya still need the right t-stat housin',....