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#1 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Anyone recognise this cable?
So today I've had my first chance to get a good look over the truck and it seems its been cobbled together to sell! Ive found 3 things so far that I'm not sure of hoping you guys can help me out
First 2 pics this cable is connected into the trans casing and the other end is loose in the engine bay. Can anyone tell me what it is? Also in the third picture is what looks like some sort of vaccum chamber and next to it a pipe with rubber connector on the end. Any ideas? Then finally in the last pic this was finger tight so I've nipped it up with some grips, is that correct? Be good to know what it is also, I'm new to the mechanics of big american engineering just incase thats not already obvious ![]() |
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#2 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Anyone recognise this cable?
The vacumm canister should be attached to the hose in the picture . It's a modulator valve, The transmission vacuum modulator valve determines how much load is on the engine so the transmission can shift properly. It has a vacuum line that connects to the intake and measures the amount of vacuum in the engine. the forth picture is the speedometer cable , it should be snug so it does'nt leak ,
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![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop Last edited by Grumpy old man; 04-07-2023 at 03:11 PM. |
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#3 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Many thanks for that Grumpy, I've got a whole lot to learn!!
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: Anyone recognise this cable?
That’s not a tv cable grumpy.
That’s a detent cable (kick down) for a turbo 350. Another thing I see in your pics. The rad fan you have. They are well known to blow apart. Best to find a better one. |
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#5 | |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Anyone recognise this cable?
Quote:
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__________________
![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
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#6 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Thanks Geezer, shame about the fan as its just about the only new bit on the truck but I dont fancy it exploding on me so I will get that changed!
Where does the other end of the detent cable attach to? Thanks |
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#7 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: Anyone recognise this cable?
To a bracket beside the carb on the drivers side.
Take a pic of your carb. Both sides and the front. Also a better pic of your engine compartment might help find other problems. |
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#8 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Thanks for your help Geezer, I'll take some pics in the morning and get them posted
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#9 |
Registered User
Join Date: Mar 2010
Location: Oregon
Posts: 189
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Re: Anyone recognise this cable?
Not to point out a correction, or step on other's responses
![]() Speedo cable leaks come from bad seals... It should not leak, even if you remove or unscrew the speedo cable. You have the correct forum for learning, and I share your sentiments. I love the information here. Bob |
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#10 |
Senior Member
![]() Join Date: Jun 2022
Location: San Ramon,CA
Posts: 504
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Re: Anyone recognise this cable?
Here's how the TH350 kickdown cable attaches on the driver's side of mine, with just a washer and a snapring(or perhaps "circlip" in the UK). Throttle rod is in the foreground attached at the left. Yours may not look like this, but the link to the tranny cable will be similar
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#11 |
68 C10 Longbed
![]() Join Date: Sep 2006
Location: Naples, Florida
Posts: 520
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Re: Anyone recognise this cable?
You also need a new tranny mount. Yours appears to be cracked.
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#12 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
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#13 |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Hi Geezer, I've attached pics of carb and engine bay, looks to me like i will need a bracket to support the detent cable to the carb?
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#14 |
Registered User
Join Date: May 2011
Location: Northern Calif.
Posts: 3,684
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Re: Anyone recognise this cable?
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#15 |
Registered User
Join Date: Aug 2010
Location: central oregon
Posts: 155
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x2 post 17
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#16 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: Anyone recognise this cable?
Nice pics!
First off. I’m wrong about your rad fan. Not the dreaded flex fan. That one is good. Number two. Here’s a link on your kick down bracket. http://67-72chevytrucks.com/vboard/s...d.php?t=648493 Another safety hazard. Move that fuel filter from above the headers. Fuel line should be straight ahead and down in front of head. |
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#17 | |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Quote:
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#18 |
Registered User
Join Date: Aug 2010
Location: central oregon
Posts: 155
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hi, looks like you need the edelbrock bushing in the thottle linkage connection. I had to help a buddy fix his on a 57 nomad. otherwise the throttle is very sloppy. good luck, chuck
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#19 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,257
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Re: Anyone recognise this cable?
Quote:
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#20 |
Senior Member
![]() Join Date: Mar 2015
Location: washington
Posts: 2,236
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Re: Anyone recognise this cable?
Post 10 is the early cable end. The 1969 through 70 style. I believe it changed n 71.
If he can find the other end of the cable take a picture and I can identify the end type. Clearly shows the later style bracket in the picture (1971 -up). You are also missing the stud where the cable/or slide/ attaches to the carburetor. If you can get it back to the way it was engineered the transmission should shift down like it was designed. You will need the vacuum line connected. It is more important to the function of the transmission than the kick down cable. |
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#21 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,257
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Re: Anyone recognise this cable?
Mr Belsh, you appear to have looped the two vacuum ports on your AFB-type carburetor together.
The vacuum port on the passenger side should be connected to the vacuum hose from the distributor vacuum canister output. The one on the drivers side should be capped -- except when connected to an external Vacuum Gauge when doing a tune up. And the speedo cable connectors on both ends should only be a firm finger tight. I'll use pliers to loosen them if they're stuck, but one shouldn't need to crank it.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 04-09-2023 at 01:22 AM. |
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#22 | |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Quote:
Also on the speedo connection can i get a new seal for the end of the cable into the tranny or do I just need a new cable? The speedo needle flickers badly when driving (like when youre doing 30 it bounces between 20 and 40 as an example) I havent had time to research it yet as getting it safe to drive is my first job!! |
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#23 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,257
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![]() Quote:
2] You may not need to replace the speedo cable if you get a good result from lubing the inner flex shaft with powdered graphite. Disconnect both ends of the speedo cable. Carefully extract the full lrngth of it. Blow some canned air [from the computer store ] down the shaft to air it out. Then you want to squeeze a puff of graphite down the hole. Follow with the flex shaft, squirting more puffs of the black dust on the cable as it goes down. When the flex shaft is back in the sheath, reconnect at the transmissionn side, then the indicator. Take it for a spin to check it out. I've taken the bounce out of my speedometer at 60-70, But I still run a GPS to crosscheck my groundspeed. Caution, the sticky black dust can get every where and it smears.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#24 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: Anyone recognise this cable?
Keep at it, making it safe.
Brakes and steering. Brakes being first on the list. Here’s a link to the speedo housing leak you have. The housing has two o-rings. The bigger outside one which seals the housing to the tailshaft and the smaller inside one that seals the driven gear. Likely yours is the inside one leaking. Best to replace the complete unit like the one in the link. Also the bouncy speedometer can be caused by old dried grease in the cable itself. The cure is removal of the inner cable and cleaning out the old grease and relubing. https://www.classictransmissionsolut...ter-turbo-350/ |
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#25 | |
Junior Member
![]() Join Date: Oct 2022
Location: Whitley bay UK
Posts: 69
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Re: Anyone recognise this cable?
Quote:
As for brakes they're driving me up the wall, I know there's a problem with the front driver side as the drum is soaking inside but I just cant get the spacers off to get into it. Tried leverage and heat and neither working. Have ordered an impact driver so hoping that will do the trick! |
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