| Original Speedometer needed [message #289772] |
Sun, 01 November 2015 01:44  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I got a call from a near by GMCer tonight who thinks he needs a replacement speedometer. From his description of the problem I tend to agree with him. I gave him a few things to check but I'm pretty sure we are going to need to replace the unit.
Does anyone one out there have one available?
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Original Speedometer needed [message #289818 is a reply to message #289772] |
Sun, 01 November 2015 18:41  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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A question for the Speedo Gurus. As long as I have the cable from the trans to the cruise control, do I also need the one from the cruise transducer to the speedo itself for the cruise and governor to work? I have an Idea.....
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Original Speedometer needed [message #289839 is a reply to message #289772] |
Mon, 02 November 2015 07:25 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Don't need the cable, thanks. I want to see if I can get a pulse from the cruise output. Maybe I can fiddle with the divide logic in a cheeeep tach and make a speedo out of it. A "round tuit" project.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Original Speedometer needed [message #289849 is a reply to message #289772] |
Mon, 02 November 2015 11:07 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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My secodn GPS will do that well. I have a handful of the cheap gauges, and one more tach would match for all of about $15. The idea is at some point to take a piece of aluminum plate and make a dash insert with them in it. Removing the speedo cable makes it a bunch easier.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Original Speedometer needed [message #289881 is a reply to message #289875] |
Tue, 03 November 2015 09:12 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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thesmith wrote on Tue, 03 November 2015 05:15Am I right in thinking that failure of the speedo cable or transducer can damage the governor gear and stop the engine?
If so then a GPS speedo and aftermarket cruise control sounds like a good thing if you remove the cable and cap the outlet.
Pete
After I lost my governor gear Manny said it is possible that the cable can be draggy. I also had the inside of the speedometer cable connection wallow out, so the square cable slipped inside. The cable felt fine but with two signs of stress I decided it was time to do away with the cable.
My solution is a VSS on the back of that gear unit that runs the Delphi cruise and a VSS speedometer from SpeedHut. I got the 85 mph version so it looks, by needle position, like I am going really fast.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
[Updated on: Tue, 03 November 2015 09:13] Report message to a moderator |
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| Re: [GMCnet] Original Speedometer needed [message #289882 is a reply to message #289881] |
Tue, 03 November 2015 09:24 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Part of the speedometer cable/governor gear failure has a cause called
header heat. Particularly when a reduction gearbox is fitted to the cable
where it exits the transmission case. The output should be lower than the
input which locates the cable further away from heat from the exhaust. I
usually insulate the lower cable with a bright orange braided nomex sleeve.
Aircraft and race cars use the stuff. Spendy, but it is effective.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Nov 3, 2015 7:13 AM, "George Beckman" wrote:
> thesmith wrote on Tue, 03 November 2015 05:15
>> Am I right in thinking that failure of the speedo cable or transducer
> can damage the governor gear and stop the engine?
>>
>> If so then a GPS speedo and aftermarket cruise control sounds like a
> good thing if you remove the cable and cap the outlet.
>>
>>
>>
>> Pete
>
> After I lost my governor gear Manny said it is possible that the cable can
> be draggy. I also had the inside of the speedometer cable connection wallow
> out, so the square cable slipped inside. The cable felt fine but with two
> signs of stress I decided it was time to do away with the cable.
>
> My solution is a VSS on the back of that gear unit that runs the cruise
> and a VSS speedometer from SpeedHut. I got the 85 mph version so it looks,
> by
> needle position, like I am going really fast.
> --
> '74 Eleganza, SE, Howell + EBL
> Best Wishes,
> George
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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