Nothing. The only time you will have a problem is if you
used dot 3. DOt 3 will boil at lower temperatures. If you
get the brakes hot, the fluid will boil, and that create air (boiled
brake fluid) in the lines, just as you need the brakes most.
Your brake  pedel may feel mushy or go right to the floor,
but will pump up. After stopping and letting the brakes cool
everything will return to normal. This has happend to me
twice, as I'm very demanding of my vehicles, with all the hills
here in W. PA. The fix is simplly bleed out all the old and in with the
dot 4. (reference the filler cap)

  This is just one more detail of the vanagon personality.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Sat, 3 Apr 1999, MtnGal wrote:

> >       DOT 4 only.
> >         Eric
> Dot 4 only in Vanagons??
> What will another dot # do to the parts?
> [[[I took a 600 mile (round trip to the warehouse)and half way through stop
> and go 80mph rush hour traffic I felt I was about to lose my brakes.
> All I had in the van was DOT3 so in it went!!]]]
>
>