I've bled like 4 million vanagon brake systems and have never had any rear
wheel cylinder shenanigans like this.
Are you sure your rear shoes are fully adjusted out to near the drums and
your bleeding method is sound ?
Scott
www.turbovans.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike S
Sent: Saturday, September 29, 2007 12:42 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Causes of rear brake soft pedal

At 01:06 AM 9/25/2007, Shawn Wright wrote...
>I actually bled the rear again tonight, even though I hadn't
>opened anything back there. I guess some air had got past the
>proportioning valve when I did
>the calipers, as there was some there. Pedal is now good and firm,
>with no "droop".

It seems you've solved your problem, but for others who may be
following this thread:

I've had a similar problem, and noticed that the rear cylinders are not
level. Air can get trapped at one end, and won't be bled when using the
normal procedure. I removed the mounting bolt for the cylinder, and
rocked it back and forth while using a pressure bleeder. I also pushed
the pistons in while doing this (to drive any air toward the center,
where the bleeder is), and got some pretty good bubbles to come out.