The brake master cylinder, you already know about. It's under your
instrument cluster. It has four "slave" cylinders, one at each wheel.

What is not so easy to see is the clutch master cylinder, which is mounted
between the brake master cylinder and the floor, vertically. You have to
get down on floor level and pull back the carpet to even see it. It can be
a PITA to replace because of where it is located.

The clutch master cylinder has one slave cylinder, the one that is mounted
on the top left of the transmission and which operates only the clutch.

Jim

On Fri, Dec 12, 2014 at 7:39 AM, T Collins <tonycollin@gmail.com> wrote:

> So what is the difference?
> I have an 85 tin top. I just got close out announcement on parts from rock
> auto and I see a clutch master cylinder (What is that??)
>
> Some of you may recall a recent email from me about leaking breake fluid. I
> intend to replace the Master Cylinder atop the guage cluster in the cabin
> and the slave master cylinder to the top drivers side of the transmission.
>
> Is there a 3 master cylinder in our vanagons that I dont know where it
> lives and what it does?
>
> 1) Brake master cylinder
> http://www.rockauto.com/catalog/moreinfo.php?pk=1608882&cc=1286445
>
> 2) Clutch master cylinder
> http://www.rockauto.com/catalog/moreinfo.php?pk=6316683&cc=1286445
>
> 3) Clutch slave cylinder
> http://www.rockauto.com/catalog/moreinfo.php?pk=968284&cc=1286445
>
>
> Can someone educate us?
>
> Thanks,
> T.
>