71-72 Throttle cable - The 1947 - Present Chevrolet & GMC Truck Message Board Network

57taskforce · 06-19-2023, 06:24 PM

Anyone bought a 71-72 4x4 throttle cable worth a crap lately? I replaced my original in early 2021 with a part from Classic Parts of America. At the time Wes and GMC Paul’s didn’t have them that I recall (could be wrong). Yesterday with less than 1,000 miles on the cable it decided to begin hanging the throttle part to wide open, and eventually break about 25 miles from home. The 10 miles or so it was acting up before it broke were a real blast, filled with full throttle runs, cutting the ignition at speed, 4-5 stops to modify the return spring so it would pull it all the way closed, ultimately leading to the cable snapping. Good thing it’s got a 4 speed so I still had full hydroboost brakes while it was running with the Ignition off.

So… Anyone bought a decent part lately that will last more than 1,000 miles?

Bigdav160 · 06-20-2023, 09:12 AM

I've seen this on vehicle with poor starter grounds. While cranking the engine starter current is flowing through the throttle cable causing to degrade.

57taskforce · 06-21-2023, 11:22 AM

Good points, it’s got 2-3 years since new 1-0 welding cable from the starter to the battery and the same for battery ground, the 2 engine to frame grounds I added are new within the last 2-3 years as well, and made from 8 or 10 gauge if I remember correctly.
The cable looks like it started to fray and began wearing in the sheath. I think I’m going to buy another cable and try to lube inside the sheath with silicone lube or something like that and see how it goes.

54blackhornet · 06-21-2023, 11:28 AM

Graphite would be better but not sure how you would get it inside the cable ?

**LockDoc** · 06-21-2023, 02:32 PM

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Try PB Blaster Dry Lube. It sprays liquid and will run down inside the cable. It then drys into a really slick white microfine powder..... Works good on locks too.

LockDoc

57taskforce · 06-21-2023, 05:16 PM

Quote:

Originally Posted by LockDoc

-
Try PB Blaster Dry Lube. It sprays liquid and will run down inside the cable. It then drys into a really slick white microfine powder..... Works good on locks too.

LockDoc

Excellent advice Leon, thanks!

**69cam** · 06-21-2023, 08:16 PM

Just a suggestion, Bob's speedometer can make you a new one. They have a website. Might be better quality than a reproduction.

57taskforce · 06-22-2023, 01:00 AM

Quote:

Originally Posted by 69cam

Just a suggestion, Bob's speedometer can make you a new one. They have a website. Might be better quality than a reproduction.

That’s exactly the kind of info I was looking for. I will check it out thanks!

06-19-2023, 06:24 PM	#1
57taskforce All about them K’s Join Date: Jun 2014 Location: Farmington, New Mexico Posts: 6,237	71-72 Throttle cable Anyone bought a 71-72 4x4 throttle cable worth a crap lately? I replaced my original in early 2021 with a part from Classic Parts of America. At the time Wes and GMC Paul’s didn’t have them that I recall (could be wrong). Yesterday with less than 1,000 miles on the cable it decided to begin hanging the throttle part to wide open, and eventually break about 25 miles from home. The 10 miles or so it was acting up before it broke were a real blast, filled with full throttle runs, cutting the ignition at speed, 4-5 stops to modify the return spring so it would pull it all the way closed, ultimately leading to the cable snapping. Good thing it’s got a 4 speed so I still had full hydroboost brakes while it was running with the Ignition off. So… Anyone bought a decent part lately that will last more than 1,000 miles? __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0

06-20-2023, 09:12 AM	#2
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 71-72 Throttle cable I've seen this on vehicle with poor starter grounds. While cranking the engine starter current is flowing through the throttle cable causing to degrade. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

06-21-2023, 11:22 AM	#3
57taskforce All about them K’s Join Date: Jun 2014 Location: Farmington, New Mexico Posts: 6,237	Re: 71-72 Throttle cable Good points, it’s got 2-3 years since new 1-0 welding cable from the starter to the battery and the same for battery ground, the 2 engine to frame grounds I added are new within the last 2-3 years as well, and made from 8 or 10 gauge if I remember correctly. The cable looks like it started to fray and began wearing in the sheath. I think I’m going to buy another cable and try to lube inside the sheath with silicone lube or something like that and see how it goes. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0

06-21-2023, 11:28 AM	#4
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,262	Re: 71-72 Throttle cable Graphite would be better but not sure how you would get it inside the cable ? __________________ 71 C-20 07 Magnum RT AWD

06-21-2023, 02:32 PM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,332	Re: 71-72 Throttle cable - Try PB Blaster Dry Lube. It sprays liquid and will run down inside the cable. It then drys into a really slick white microfine powder..... Works good on locks too. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

06-21-2023, 08:16 PM	#7
69cam Senior Member Join Date: Jan 2017 Location: Olney Il. Posts: 221	Re: 71-72 Throttle cable Just a suggestion, Bob's speedometer can make you a new one. They have a website. Might be better quality than a reproduction.



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