Speedo help please! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Buzzman · 12-24-2012, 02:38 PM

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!

notallthere · 12-24-2012, 03:43 PM

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.

**HIGHWAY BY THE SEA** · 12-24-2012, 04:01 PM

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.

Buzzman · 12-24-2012, 04:18 PM

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.

BsNhusker · 12-24-2012, 10:05 PM

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.
Posted via Mobile Device

12-24-2012, 02:38 PM	#1
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	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! __________________ 79 C10 Cheyenne SWB Daily Driver

12-24-2012, 03:43 PM	#2
notallthere Registered User Join Date: Nov 2011 Location: sarnia ontario canada Posts: 211	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.

12-24-2012, 04:01 PM	#3
HIGHWAY BY THE SEA Registered User Join Date: Nov 2012 Location: BY THE CAROLINA SEA Posts: 919	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. __________________ 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

12-24-2012, 04:18 PM	#4
Buzzman Registered User Join Date: Jun 2011 Location: Spokane, WA Posts: 48	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. __________________ 79 C10 Cheyenne SWB Daily Driver

12-24-2012, 10:05 PM	#5
BsNhusker Registered User Join Date: Dec 2012 Location: Washington, Ia Posts: 7	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. Posted via Mobile Device __________________ 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



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.