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#1 |
Registered User
Join Date: Nov 2012
Location: San Jose California
Posts: 196
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Speedometer not working
My speedometer was not working so I disconnected from back of panel assembly to see if inside wold spin while If drove it. It was not spinning, I fiddled with it while driving and got it to work for a second. The transmission is a 3 speed with OD. The attached picture shows the cable ends. The red end plastic tipped was in the cab. The other end was in the transmission. Is this the correct orientation. What could be the problem?
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#2 |
Registered User
![]() Join Date: Oct 2013
Location: Elkton
Posts: 693
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Re: Speedometer not working
Wow good question all the cables i ever messed with the bare square end went to the speedo .If you can spin the cable by hand when its hooked up to the trans its broken .
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#3 |
Registered User
Join Date: Jul 2011
Location: Tacoma, WA
Posts: 176
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Just had this in mine. cable was broken about half way down and would sometimes catch and half-work. pretty easy test/fix just to replace it and only costs like $4 at autozone.
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1965 C10 Longbed Stepside 1969 Chevelle Malibu 1962 C20 Fleetside - Build Thread (Sold before I could finish) |
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#4 |
Registered User
Join Date: Feb 2013
Location: Cottonwood, Arizona
Posts: 1,376
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Re: Speedometer not working
Sorry to break in on this thread, but I'm having issues with my speedometer as well. It works, but at lower speeds, it bounces back and forth above and below the speed I'm driving. My trans is a 1978 TH350. I replaced the cable probably 15 years ago or so, from Autozone, but it's for a Powerglide, not sure if that makes a difference. Started doing the "bouncing" awhile ago, not recently. Could my cable be getting ready to quit on me?
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#5 |
Registered User
Join Date: Nov 2000
Location: Chapin, South Carolina, USA
Posts: 87
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Re: Speedometer not working
When mine started bouncing I pulled it, cleaned it, then lubed it before I put it back in. Seems to have taken care of the problem.
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1965 Chevy C10 Stepside Shortbed--2012 370Z Base Gun Metallic--2020 Chevy Silverado RST Crew Cab |
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#6 | |
Chevy addict
Join Date: May 2012
Location: Iron Ridge, WI
Posts: 1,085
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Re: Speedometer not working
Quote:
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#7 |
Registered User
Join Date: Feb 2013
Location: Cottonwood, Arizona
Posts: 1,376
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Re: Speedometer not working
Thanks Mike W, and 63burban. Will 3-N-1 oil work for the speedometer, and the cable? Is there a thread on cleaning the speedo? I wiped mine down a few months ago, and it took some of the paint off of one of the numbers on the odometer, without using any cleaner. I'll eventually get a decal set for it, but right now I'll just clean and oil it.
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#8 |
Registered User
Join Date: Nov 2012
Location: San Jose California
Posts: 196
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Re: Speedometer not working
Cable looks good. How does it attach at the trans. I pulled the adapter on the trans housing in order to replace leaking o ring. Saw a cylinder inside. Could the cylinder be removed to inspect without messing up trans?
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#9 |
Registered User
Join Date: Mar 2015
Location: Los Angeles CA
Posts: 99
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Re: Speedometer not working
I have heard of lubing with the wrong oil and having the oil work its way up the cable and splash on the inside of the speedo dial. I took my cable out, cleaned the housing and cable then wiped grease in the cable.
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#10 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Speedometer not working
Talking about the speedo trans gear? It will just slid out and then you can replace the o ring.
You can see how it gets locked in by the little plate with the bolt behind it. And I like graphite based lube for the speedo cable. Works far better than wd40. Clean the cable inside and out as best you can with carb cleaner or something similar. Soak it in a bucket if you have too. The nice thing about the graphite is it won't eventually gunk up on you and it doesn't get temperamental under hi or low temps.
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1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer Last edited by 1963c-10; 05-26-2015 at 04:00 PM. |
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#11 |
Registered User
Join Date: Nov 2012
Location: San Jose California
Posts: 196
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Re: Speedometer not working
Ok, I pulled that but there was a separate tapered cylinder inside loose. Maybe the trans gear is broke?
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#12 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Speedometer not working
I have a 3 speed parts diagram....maybe it'll help.
PM me your address and I can send it to you.
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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#13 |
Registered User
Join Date: Nov 2012
Location: San Jose California
Posts: 196
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Re: Speedometer not working
Thanks, I think my gear is missing or broken. Where can I source these? Need the white gear at the trans
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#14 |
Registered User
Join Date: Mar 2015
Location: st cloud mn
Posts: 163
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Re: Speedometer not working
Make sure you identify the color of the speedo drive gear in the trans. Different colors have different gear tooth counts
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