I'm doing the same job right now.
The correct size is 46 mm.
A  1 13/16" socket also fits nearly perfect.  I got one from Sears a while back and I'm using it
now.
Instead of the 3/4" drive, you can also use a BF pipe wrench directly on the socket.  We have one
about 30" long that breaks stubborn ones loose with ease.
-Hans

----- Original Message -----
From: "AAG - Larry Word" <word_aag@COMCAST.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, May 06, 2005 1:06 AM
Subject: 1985 Vanagon 2 WD - rear axle nut

Please verify the socket size needed for removal.

46 mm?  Correct????

What is that in American Size and can that be done?

I plan to use a 3/4 inch. drive and an approx. 3 ft. pipe....

Thanks

Larry
Georgia