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9/14/14 9:48pm - Original Message: 'speed cable'
Bags74Vette
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Joined: 6/22/2014
Posts: 46
 Could someone tell me why my speedo cable is making a clicking noise on my 74 Vette. The faster I go the faster the noise. Seems to be a burning smell from it also. Any ideas?

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9/15/14 6:26am - Reply: 'Re: speed cable'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19458
 Could just simply need to be lubricated. Does the needle "jump" as you drive?



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Joel Adams
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9/15/14 6:32am - Reply: 'Re: speed cable'
Bags74Vette
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Joined: 6/22/2014
Posts: 46
Yes it does. Mostly at low speeds around 10 -20. when it jumps the needle jumps the same time it clicks

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9/15/14 12:25pm - Reply: 'Re: speed cable'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19458
I would suggest removing the inner cable and lubricating it....that should take care of the problem. If it does not, then the speedo head itself is likely dirty, or otherwise damaged.
The inner cable can be removed by dis-connecting the cable from the speedo head, under the dash. It's kinda hard to get to, but it can be done. I find it easier to get to by removing the upper dash pad, and going in from the top. If you have TINY hands, you can get it from underneath. Once disconnected, pull the inner cable out of the outer cable housing. You can use engine oil, trans fluid, or a light weight lithium grease to lube the inner cable...just make sure to lube the entire length. Then, slide the inner cable back down into the outer housing, spinning it a little as you go. Re-attach the cable to the speedo head, and see how that works.
There is a funky clip that holds the cable to the speedo head, that is sometimes frustrating to get to, to release the cable. I have a pic of it somewhere, to give you an idea of what it looks like...I'll have to look for the pic, unless someone else(Bob?) has one handy. Thumbs Up




|UPDATED|9/15/2014 10:25:35 AM (AZT)|/UPDATED|


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Joel Adams
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             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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9/16/14 11:52am - Reply: 'Re: speed cable'
jdgrant Gold Member
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HOT SPRINGS NATIONAL PARK, AR - USA

Vette(s):
1978 (25th Annv. Edition)Red, Black interior, 4-Speed Transmission, L-82, Power & Air, Very Rare Option Package(Only 145 Red 1978s with a 4 speed trans) & Very Original Car, with original Window Sticker, Bill of Sale and all documentaion.

Joined: 11/12/2003
Posts: 190
I pulled my cable out on my 78 and help my friend on his 81 this year. I had 2 sections with rust build up. I knocked that off with a wire brush, greased the heck of it and reinstalled. No issues since. It reall was not very are to disconnet on either end. I dod however, take precautions not to get any grease on my interior. I used a cheap plastic paint drop cloth. Pretty straightforward fix. Enjoy! 



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John D. Grant "Corvette; Cure for the common mid-life crisis!"
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9/19/14 6:10pm - Reply: 'Re: speed cable'
dwright Gold Member
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Victor, NY - USA

Vette(s):
2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe

Joined: 7/12/2004
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I have cruise control, so to relube the lower cable is fairly easy.
Is it possible to disconnect the cable at the tranny and pull the inner cable from that end?


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9/20/14 10:07am - Reply: 'Re: speed cable'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19458
dwright said
Is it possible to disconnect the cable at the tranny and pull the inner cable from that end?

No...the top end of the cables have a squared off drive fitting swedged on them that is larger than the ID of the outer cable housing. The inner cable will only come out from the top. Thumbs Up



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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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