With wear mine had ruined the threads on the post.  I used a metric die one
size smaller (forget which size) and a new nut has held the new wiper arm
fine since then.

Jim Creech
87 Westy GL 2.1

> I had bought my one van with the passenger side post broken off, to wear
you
> could not re thread it to get a nut on it.  Rather than rip apart
everything
> to get at replacing it, I drilled and tapped what was there and inserted
bolt
> to hold the wiper.  I has worked great so far, but I will be sure not to
try
> to push a windshield full of snow with it.
>    Possibly this can work for you, although since mine was broke off, I
had a
> little more meat to work with.
>
>  Alan
> 87 sycnro
> 84 vanagon
> 65 beetle