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Topic: Speedometer

in Forum: C3 Interior


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Speedometer

Posted: 5/23/06 5:40pm Message 1 of 27
RHeyboer
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Grandville, MI - USA
Joined: 5/8/2004
Posts: 140
Vette(s): 1968 427/390 Coupe

Can someone tell me why my speedometer is jumpy?

 

 




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Speedometer

Posted: 5/23/06 7:03pm Message 2 of 27
Ron 78
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BINGHAMTON, NY - USA
Joined: 7/19/2003
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Either the cable is dry,or it has a kink in it


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Speedometer

Posted: 5/23/06 7:10pm Message 3 of 27
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Too much caffine?

Cable may need lubed, or replaced. Could also be a gear problem. If you can hear a scratchy noise in the dash, it's probably the cable.
Could also be the speedo head itself.


Joel Adams
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Speedometer

Posted: 5/24/06 3:20pm Message 4 of 27
Chips58
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Australia
Joined: 5/6/2004
Posts: 535
Vette(s): 71 Coupe Black on Black
The only other reason is the nylon fitting at the gearbox.  They sometimes loose a tooth and it won't be long until the speedo fails all together.  Easy job to replace it or the cable.  If it's the speedo it my just need a good cleanout.  If the cleanout doesn't fix it a new speedo mechanism can be purchased.


Speedometer

Posted: 5/24/06 3:38pm Message 5 of 27
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longhorn294
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DeBerry, TX - USA
Joined: 2/27/2002
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Vette(s): 1971 383 Stroker- mille miglia red...5 speed

 My speedometer works but my odometer and trip mileage thingy doesn't. What's that gonna take to fix? Thingy??? Must be beer thirty!




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Speedometer

Posted: 5/24/06 8:44pm Message 6 of 27
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Adams' Apple
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Odometer/trip thingy malfunctions require speedo head service/repair. No easy way out of this one.


Joel Adams
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Speedometer

Posted: 5/26/06 1:18pm Message 7 of 27
75BrownC3
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Rhineland, MO - USA
Joined: 4/11/2006
Posts: 108
Vette(s): Picked it up and it running good now. Just need to do a few more things and she will be 100 percent.
[QUOTE=longhorn294]

 My speedometer works but my odometer and trip mileage thingy doesn't. What's that gonna take to fix? Thingy??? Must be beer thirty!

[/QUOTE]

At least your milage stays the same no matter how far you drive. Comes in handy when the state historical society comes around to verify yearly milage.

 




Speedometer

Posted: 5/31/06 8:46pm Message 8 of 27
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aceinthehole
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Manteca, CA - USA
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Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
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Jimmy B.
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Speedometer

Posted: 6/1/06 3:24pm Message 9 of 27
RADARB8
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Montesano, WA - USA
Joined: 9/27/2003
Posts: 1931
Vette(s): had a really nice one. sold it to a good friend. Purchased 2004 custom coupe in Feb. 2009 did not tell anyone here until August 2009. BAD I KNOW.

since we are talking speedo's, and no I don't wear them, mine seems to be about 6 to 8 degrees fast so if I am traveling at 70 miles per hour the police man says i was going 77?

anything to adjust it besides slowing down, i think that would be to long of a job and to hard to follow.




Speedometer

Posted: 6/1/06 4:25pm Message 10 of 27
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!

All you need to do is change the driven gear in the transmission that drives the speedo cable.  Pull the old gear out, count the teeth, and get on with one more tooth.  It will read a bit slower.

For the Odometer not working, the gears in the speedo head are not working.  These are plastic/nylon and can strip or come out of place.  There are place to order the gears, but it may take a bit to get them.  It has to be a place that repairs speedos.    You can try Electro Sound on Brookpark Rd in Cleveland OH.   They have the parts.   It's not difficult to replace the gears......once the speedo is out of the dash.




in Forum: C3 Interior


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