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Re: Prop/driveshaft vibration

To: mhooper@pix-cinema.com
Subject: Re: Prop/driveshaft vibration
From: "Paula J. Graffam" <pjgraffam@juno.com>
Date: Mon, 24 Mar 2003 18:12:16 -0500
Hi Mark,

I really don't have anything different with my speedo.  The cable
conversion is straight forward . . . it's simply connected to the right
side of the tranny and is braced accordingly and tracks like the
original.  I don't see how the vibration could affect my speedo.

Al  

On Mon, 24 Mar 2003 17:57:48 -0500 Mark Hooper <mhooper@pix-cinema.com>
writes:
> Al:
> The only possible cause would be that the link between the speedo 
> cable and
> the transmission was being affected by the vibration. That would 
> indicate
> some sort of magnetic follower gear in the transmission which seems
> amazingly unlikely for a mechanical speedo. What sort of speedometer 
> setup
> do you have in the conversion?
> 
> Mark Hooper
> 1972 TR6
> 
> 
> -----Original Message-----
> From: Paula J. Graffam [mailto:pjgraffam@juno.com]
> Sent: Monday, March 24, 2003 5:28 PM
> To: 6pack@autox.team.net
> Subject: Prop/driveshaft vibration
> 
> 
> Hi Listers,
> 
> After converting my tranny(van den Akker) I noticed a definate 
> vibration
> at 60mph@ 3000+ rpm.  Some call it harmonic vibration.  After 
> talking to
> Herman, he advised me to rotate the driveshaft 180degrees ( maybe I
> incorrectly installed the shaft).
> 
> Well it worked . . . much to my relief!!!  I guess it's a common
> troubleshooting technique.  However, I also noticed that my rpms
> DECREASED especially in 4th and 5th gears.  I'm not sure why this 
> is. 
> Mind you now, I'm NOT complaining.
> I'm now doing about 26k at 60mph and just about 29k at 70mph.   
> 
> Does anyone know why I'm doing better on the rpms AFTER the 
> correction?  
> 
> Regards,
> 
> Al Graffam
> 
> ________________________________________________________________
> 


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