You are right that it's a vent line on a syncro,
But it's not for the front or rear diff.
It's a vent line for the sealed clutch area on a syncro, as they come from
the factory, so water doesn't get in the clutch area fording streams and
ponds.
  You don't need it on there, and personally, I wouldn't seal the clutch
area. I'd want any oil that leaks into the clutch area to be able to drain
right out the bottom of the bell housing area.
Scott
www.turbovans.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Joe Federici
Sent: Friday, November 09, 2007 8:45 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Mystery part

If it's a syncro then it's the vent line for the rear and front diff.

JFF

On Nov 9, 2007, at 11:36 AM, Greg wrote:

It is a 87 Syncro manual.
I tried to trace where that hose was going to but with no luck.
It drives fine without it except maybe a whistling noise when I
accelerate at a certain pace.

I will try the plug then

Greg.

On Nov 9, 2007, at 8:25 AM, Chris Lisica wrote:

> If I had to say, I'd say it's a non-stock VW part installed by a
> previous owner. Of course, if you are the only owner, then I'm
> wrong. ETKA only shows a cover cap that is supposed to go there (PN
> 025101109B). What in the world does that hose go to? I've never
> seen a hose going to that hole, but then again, I am by far the
> expert. The hole is there to access the bolts that hold the plate
> (don't know tech name) to the torque converter. I just used it the
> other day for that purpose!
>
> chris
>
> On Nov 9, 2007 7:43 AM, Greg <bourongregoire@qwest.net> wrote:
> Hi all,
>
> While changing the heads of my car, I accidentally (of course) broke
> this little white plastic "L" shape part. See Link for pictures.
> http://picasaweb.google.com/fatandFrank/Vanagon
> To order a new one, I then looked in the Bentley to find its name,
> nothing...
> I emailed a VW specialist part store with those pictures, still
> nothing...
> Maybe someone here can help me?
> Does anyone know what is it, what is its name and what is the part
> number?
>
>
>
> Thanks
>
> Greg.
>
>
>
> --
> Chris
> 88 Vanagon GL (daily driver)
> 87 Westfalia (in progress)