Speedo Cable - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Astro-Balls · 10-31-2019, 07:08 PM

I need a 69" speedo cable for a '68 C20 manual 4sp. Mine is Starting to make the gauge go crazy jumping around.
Found this one at NPD, any other suppliers carry the heavy speedo cable like the original?

https://www.npdlink.com/product/cabl...1968&year=1968

geezer#99 · 10-31-2019, 07:12 PM

Try here.

https://transmissioncenter.net/

**LockDoc** · 10-31-2019, 07:16 PM

Quote:

Originally Posted by Astro-Balls

I need a 69" speedo cable for a '68 C20 manual 4sp. Mine is Starting to make the gauge go crazy jumping around.
Found this one at NPD, any other suppliers carry the heavy speedo cable like the original?

https://www.npdlink.com/product/cabl...1968&year=1968

Did you pull the whole thing out, slide the inner cable out and clean both parts good and lube it? That's probably all it needs.

LockDoc

Astro-Balls · 10-31-2019, 08:06 PM

Yes,, I pulled the whole cable out, It a pretty beefy outer cable compared to most aftermarket.
Is the inner cable completely removable? Mine doesn't seem to want to come out and it doesn't spin easy.

**AussieinNC** · 10-31-2019, 08:16 PM

Spray WD 40 down the inner cable until it drips out the other end, and let it soak.

Pull the inner cable out from the top....

Check the outer cable for any rub or burned up areas
Check the inner cable for any damaged areas

If either is damaged, replace the cable assembly.

If both inner and outer cable sections are in good condition, proceed to next step

Spray WD-40 down the cable outer until it runs out the bottom end...let it drip dry....

Lube the inner cable with a light smear of light grease and reinsert inner cable from top....

Connect transmission end of cable first, then connect speedo end...

Road test...

LMC have an 83" under 47-2022-C

Astro-Balls · 10-31-2019, 08:44 PM

I will give it a go...

**LockDoc** · 10-31-2019, 10:27 PM

Quote:

Originally Posted by Astro-Balls

I will give it a go...

I agree with everything Aussie says except the WD40. Unless it is the WD40 penetrating oil. Otherwise I would use a penetrating oil like Kroil, PB blaster, or ZEP45.

LockDoc

Astro-Balls · 10-31-2019, 11:50 PM

I should buy stock in Kroil..

Astro-Balls · 11-01-2019, 02:29 PM

OK, Got the inner speedo cable out, cleaned the housing after soaking overnight.
Lots of gunk came out of that housing.. No wonder it was having trouble spinning.
Ordered some special graphite speedo cable lube, should be here Monday.

10-31-2019, 07:08 PM	#1
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Speedo Cable I need a 69" speedo cable for a '68 C20 manual 4sp. Mine is Starting to make the gauge go crazy jumping around. Found this one at NPD, any other suppliers carry the heavy speedo cable like the original? https://www.npdlink.com/product/cabl...1968&year=1968 __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA

10-31-2019, 07:12 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,541	Re: Speedo Cable Try here. https://transmissioncenter.net/

10-31-2019, 08:06 PM	#4
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Re: Speedo Cable Yes,, I pulled the whole cable out, It a pretty beefy outer cable compared to most aftermarket. Is the inner cable completely removable? Mine doesn't seem to want to come out and it doesn't spin easy. __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA

10-31-2019, 08:16 PM	#5
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,172	Re: Speedo Cable Spray WD 40 down the inner cable until it drips out the other end, and let it soak. Pull the inner cable out from the top.... Check the outer cable for any rub or burned up areas Check the inner cable for any damaged areas If either is damaged, replace the cable assembly. If both inner and outer cable sections are in good condition, proceed to next step Spray WD-40 down the cable outer until it runs out the bottom end...let it drip dry.... Lube the inner cable with a light smear of light grease and reinsert inner cable from top.... Connect transmission end of cable first, then connect speedo end... Road test... LMC have an 83" under 47-2022-C __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox Last edited by AussieinNC; 10-31-2019 at 08:27 PM.

10-31-2019, 08:44 PM	#6
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Re: Speedo Cable I will give it a go... __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA

10-31-2019, 11:50 PM	#8
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Re: Speedo Cable I should buy stock in Kroil.. __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA

11-01-2019, 02:29 PM	#9
Astro-Balls Registered User Join Date: Feb 2019 Location: Nor Cal Posts: 822	Re: Speedo Cable OK, Got the inner speedo cable out, cleaned the housing after soaking overnight. Lots of gunk came out of that housing.. No wonder it was having trouble spinning. Ordered some special graphite speedo cable lube, should be here Monday. __________________ 1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA



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