Hey David,

if this is on the outer then I would recommend just pulling the stub axle so
that you can get to the problem.  Pulling the stub axle is easy enough and
should only take an extra ten minutes or so removal and reinstallation if
all goes well.  You need to be careful to keep it clean though so that you
don't contaminate the bearings with dirt.

I don't know if it will work but once the flange is out you may be able to
access the nut from the back side.

Jonathan Poole
'82 ac westy