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12-24-2012, 02:38 PM
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#1 |
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Registered User
Join Date: Jun 2011
Location: Spokane, WA
Posts: 48
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Speedo help please!
Hey There,
My speedometer continues its quest to drive me insane with its clicking and bouncing around. When I originally got the truck, it was hooked up for cruise with the two cables. Speedo didn't work. So I went with the single cable setup (lubed properly with liquid graphite - it's not the cable). It worked fine for a while, but when the weather turned cold, the clicks began. Tried greasing up the dash end, but that didn't help. So I picked up a used speedo on ebay, hooked it up to the cable without intalling it and it worked fine, but when I actually put it in the dash, the clicking started again. So it's not the cable, and I don't think it's the driven gear in the tranny. That leaves something in the dash - maybe the retainer clip is messing it up? Has anyone encountered a similar problem? Thanks!
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79 C10 Cheyenne SWB Daily Driver |
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12-24-2012, 03:43 PM
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#2 |
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Registered User
Join Date: Nov 2011
Location: sarnia ontario canada
Posts: 211
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Re: Speedo help please!
The original one in mine did the same thing especially in the winter until some oaf decided to take apart the dash and clean it up. I broken the needle off. My replacement was one from an 84 and it is quieter and more stable. It could be just the older ones that get worn out.
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12-24-2012, 04:01 PM
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#3 |
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Senior Member
 
Join Date: Nov 2012
Location: BY THE CAROLINA SEA
Posts: 922
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Re: Speedo help please!
When mine did the "jumping" there was no "clicking", but it turned out to be the speedometer. If your replacement one worked for a while and suddenly messed up then I am leaning toward BOTH of your used speedos are bad. The newer one may have worn out shortly after you installed it. Ironically me "new" speedometer came out of a 1976 truck and replaced a 1981 speedo and works great.
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FRANKENTRUCK 1981 Chevrolet C10 Shortbed Stepside GRANDTRUCK 1968 Chevrolet C10 Stepside Longbed http://67-72chevytrucks.com/vboard/s...d.php?t=584617 PROJECT JIGSAW 1967 GMC C3500 GREAT WHITE 1986 Blazer M1009 454 engine w/700R4 transmission gas conversion |
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12-24-2012, 04:18 PM
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#4 |
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Registered User
Join Date: Jun 2011
Location: Spokane, WA
Posts: 48
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Re: Speedo help please!
Yeah, the "newer" one could have been shot, too. It had 17k on the odometer, so who knows, that might be 217k for all I know. Maybe I'll just spring for an acutal "new" one ($110) from RockAuto.
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79 C10 Cheyenne SWB Daily Driver |
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12-24-2012, 10:05 PM
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#5 |
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Registered User
Join Date: Dec 2012
Location: Washington, Ia
Posts: 7
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Re: Speedo help please!
Mine has a chirping sound and it bounces till you get above 10 mph and then it just continues to chirp faster as I drive faster when it's cold. Was leaning towards the speedometer myself. Thinking about rebuilding the whole insterment cluster since lmc has that factory looking tach now.
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1985 GMC Sierra Classic C1500 305 4bbl edelbrock carb TH350 with lock up TC and 2.73 rear 1981 GMC Sierra Grande K2500 350 4bbl Qjet carb TH400 NP 208 T Case with 3.42 Diffs 
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