my speedometer is possessed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68C15 · 11-30-2007, 09:53 PM

ever since it rolled over at 100K miles it has been acting weird. it will show whatever speed it wants to. I can be rolling along with 30 MPH traffic and it will sometimes show 50 while other times it will show 20 or even 10. then when I come to a stop it will stay up wherever it feels is appropriate.

I wish it would tell me how fast I am going instead of how fast it wants me to go.

has anyone else had this? without spending my boys' X-mas present $ how do I fix this?

Cyclone44 · 11-30-2007, 10:12 PM

I had one do this and I had to replace the whole speedo, Something in it was broken, I'm not sure what but when I put another one in, It stopped going nuts.....George

BCOWANWHEELS · 11-30-2007, 10:22 PM

your cable needs to be lubed.......
bob

**LockDoc** · 11-30-2007, 10:33 PM

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It just wants to show you who's boss.....

.. If you start using premium gas it won't do it any more..... NO, I swear, it's true...

LockDoc

DavesRide · 11-30-2007, 10:43 PM

Quote:

Originally Posted by LockDoc

-
It just wants to show you who's boss.....

.. If you start using premium gas it won't do it any more..... NO, I swear, it's true...

LockDoc

I think this might work only if you are drinking the gas. I would agree with lubing the cable first. Maybe even replacing the old and I mean age wise cable and housing. There are other places to fail also along with the gauge itself. Test each one before drinking the high octane gas. I buy my rum way cheaper than gas and my gauge works just fine.

DavesRide · 11-30-2007, 11:06 PM

Seriously, the speedo's do go bad. But from my experience the speedo only has a few parts and unless it has been exposed to the elements seldom has troubles. The whole deal is driven by two plastic gears in the trans that drive a cable (square in shape) within a round housing attached to the backside of the speedometer. All connections must be clean tight. TEST each one seperate from the other to find bad spot. My easiest test would be hook up my speedometer in your truck sit on the other side and go for a ride in your truck to see for sure. That would work fine but I fart alot and you would not be comfortable. Maybe you could try that idea out without me. Anyhow, just some ideas

berencam · 11-30-2007, 10:48 PM

my truck did that too it ended up being a loose cable on the speedo.....just needed tightening up

72BLUZ · 11-30-2007, 11:13 PM

Some Times In Vehicals That Have Speedo Cables, The Cables Get Twisted In The Housing. Thus Causing This Problem. But As Stated In The Other Threads, It Could Be In The Speedo Head. Or Possibly The Gears In The Tranny May Need Replaced.

11-30-2007, 09:53 PM	#1
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	my speedometer is possessed ever since it rolled over at 100K miles it has been acting weird. it will show whatever speed it wants to. I can be rolling along with 30 MPH traffic and it will sometimes show 50 while other times it will show 20 or even 10. then when I come to a stop it will stay up wherever it feels is appropriate. I wish it would tell me how fast I am going instead of how fast it wants me to go. has anyone else had this? without spending my boys' X-mas present $ how do I fix this?

11-30-2007, 10:12 PM	#2
Cyclone44 Step Brother Join Date: Sep 2007 Location: K-town Posts: 4,029	Re: my speedometer is possessed I had one do this and I had to replace the whole speedo, Something in it was broken, I'm not sure what but when I put another one in, It stopped going nuts.....George

11-30-2007, 10:22 PM	#3
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: my speedometer is possessed your cable needs to be lubed....... bob __________________ I BELIEVE IN JOHN 3:16

11-30-2007, 10:33 PM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,935	Re: my speedometer is possessed - It just wants to show you who's boss....... If you start using premium gas it won't do it any more..... NO, I swear, it's true... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

11-30-2007, 11:06 PM	#6
DavesRide Registered User Join Date: Oct 2007 Location: Garageless, Missouri Posts: 408	Re: my speedometer is possessed Seriously, the speedo's do go bad. But from my experience the speedo only has a few parts and unless it has been exposed to the elements seldom has troubles. The whole deal is driven by two plastic gears in the trans that drive a cable (square in shape) within a round housing attached to the backside of the speedometer. All connections must be clean tight. TEST each one seperate from the other to find bad spot. My easiest test would be hook up my speedometer in your truck sit on the other side and go for a ride in your truck to see for sure. That would work fine but I fart alot and you would not be comfortable. Maybe you could try that idea out without me. Anyhow, just some ideas __________________ R.I.P ESLL Even as the body dies the spirit lives on in the people you touched

11-30-2007, 10:48 PM	#7
berencam Registered User Join Date: Aug 2007 Location: branson mo Posts: 933	Re: my speedometer is possessed my truck did that too it ended up being a loose cable on the speedo.....just needed tightening up __________________ 69 chevy c10 350 3 speed manual wood bed build thread here r.i.p. 70 c10 auto 350 build here

11-30-2007, 11:13 PM	#8
72BLUZ Registered User Join Date: Nov 2006 Location: lafayette, ga. Posts: 832	Re: my speedometer is possessed Some Times In Vehicals That Have Speedo Cables, The Cables Get Twisted In The Housing. Thus Causing This Problem. But As Stated In The Other Threads, It Could Be In The Speedo Head. Or Possibly The Gears In The Tranny May Need Replaced. __________________ Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same.... Ronald Reagan



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