I need to change the transmission oil in my vanagon (4-speed manual
transmission).  I have checked Bentley, but there is no mention of how to
drain the old oil.  I believe the filling procedure is to pump the oil into
the fill plug that is about half way up on the left forward part of the
transmission until the level is even with the bottom of the hole.  Is this
correct.  Any hints on draining the old oil.