When my 59 GMC did this I tried numerous different lubes on the speedo
cable. I tried graphite, oil, and finally I have had success using an engine
rebuild prelube, of which I cannot remember the name. I think it started
with a P.
Blaine Dumkee
59 GMC 9314
70 GMC 20
Fort Smith NT
Canada
----- Original Message -----
From: "Doug Pewterbaugh" <dpewter@email.msn.com>
To: <Mghardy001@aol.com>; <oletrucks@autox.team.net>
Sent: Wednesday, August 21, 2002 8:29 AM
Subject: Re: [oletrucks] 56 speedometer
> It sounds like you have a "sticky" cable. Try removing the inside of the
> cable (should just pull out of either end). See if it is dry & lube well
> with a light grease. Reinstall & check. Try a different cable, if you
have
> one.
>
> Regards,
> Doug Pewterbaugh
> dpewter@msn.com
> Denton, TX
> 49 3104 216 5-window
> ----- Original Message -----
> From: <Mghardy001@aol.com>
> To: <oletrucks@autox.team.net>
> Sent: Wednesday, August 21, 2002 8:24 AM
> Subject: [oletrucks] 56 speedometer
>
>
> > Hello,
> > My 56 1/2 ton has a 6-cylinder and hydramatic trans.
> > I just replaced the speedo head assembly and cable.
> > Under any kind of acceleration the needle moves back and forth quickly
> > between 30-70 mph. Only when maintaining a constant speed does it
settle
> at
> > the correct reading.
> > Is this normal?
> > Thanks.
> > Mike
> > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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