<VV> speedo and clutch questions

[hallgrenn]

FWIW when I had a bucking problem like yours I had just installed a rebuilt pressure plate (by a known, good, rebuilder) with the Vega clutch disk which is spring loaded, unlike the original Corvair disk, and had a bucking problem as well.  I replaced the front mounts on the GB and took all slack out of the clutch linkage and it quieted down.  I've come to think that the extra twist allowed by the Vega clutch disk will demonstrate any drivetrain/tranny mount/linkage sloppiness--at least more so than the original disk.  Bob
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-------- Original message --------
From: MarK Durham via VirtualVairs <virtualvairs at corvair.org> 
Date: 08/28/2015  2:17 PM  (GMT-05:00) 
To: Robert Brought <blbrought at gmail.com> 
Cc: Virtual Vairs <virtualvairs at corvair.org>, judynrandy at comcast.net 
Subject: Re: <VV> speedo and clutch questions 

Bob, funny when those types of things come back to bite you.
I bought a rebuilt distributor from a reliable source once and installed it
with new points, etc, set it up, ran great for about 30 miles. Reset, twice
to get home. Inspected the lobes of dist and had been accidentally bead
blasted which wore the points cam block away. So I put a pertronix in and
has run great since.
Mark Durham
Hauser, ID
On Aug 28, 2015 10:18 AM, "Robert Brought via VirtualVairs" <
virtualvairs at corvair.org> wrote:

> Had a similar problem with my '64 Rampside.  The drive train would buck and
> shudder occasionally when the clutch was engaged, some times going forward
> and sometimes in reverse.  Long story short, I finally discovered that the
> bolts holding the transmission to the crossmember were all loose!  Not sure
> who failed to torque them, but I have a good idea. May not be the source of
> your problem, but easy to check.
>
> Bob Brought
>
> On Thu, Aug 27, 2015 at 10:41 PM, Bryan Blackwell via VirtualVairs <
> virtualvairs at corvair.org> wrote:
>
> > Hi Randy,
> >
> > > On Aug 27, 2015, at 6:45 PM, Randy Hook via VirtualVairs <
> > virtualvairs at corvair.org> wrote:
> > >
> > > The tire sizes are 180/70 13's on the rear and 180/80/13's on the
> > front.  Now, the question is this:  would the difference in tire size be
> > the reason for the inaccurate speedo readings, or should I look somewhere
> > else?
> >
> > Almost certainly.  BTW, pretty much all the tires I see have sizes ending
> > in '5'.  I'm pretty sure you really mean 185/70-13 and 185/80-13.  The
> > latter is fairly close in diameter to the stock 6.50-13.
> >
> > >  Would changing the tires front to rear remedy the situation?
> >
> > Yep.  Early speedo drive is off the transmission, so that should work.
> > I'd start by doing that and then re-check to see where it's at, there
> are a
> > couple different speedo drive gears if you want to adjust it further.
> >
> > --Bryan
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