Joe H that is an incredibly informative article, I wonder if you could post it in the tech articles section..?
So, is the cover on the passenger side of the truck simply an access cover for doing a flush?
That's Brad Allen's awesome collection of old slides that he's posted. The side cover can't really be taken off without removing the pitman arm and the sector shaft. It's got a screw used to adjust the lash on the gears.