Choke? What is this in the pic?! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nomad0231 · 09-20-2009, 11:10 AM

Ok. So, I know very little about engines, but am trying to learn! Yesterday, me and a friend put on some ceramic coated long tube headers ($186 from Summit!!) Anyways, I noticed this linkage, its in the pic. I can pull on it a little bit. What is this??!? I have trouble with starting when cold, takes a long time to get it to turn over. I bought an Edelbrock 60 w/ elec choke from a board member and hope it fixes the start problem. BUT WHAT IS THIS THING?!?!

**too much stuff** · 09-20-2009, 11:12 AM

Looks like the kickdown for an auto trans.

BLACK AND BLUE 67-72 · 09-20-2009, 11:33 AM

Transmission kick down cable, it hooks up on the drivers side of the carb.

haminator · 09-20-2009, 11:36 AM

It is the kick down cable from your T-350 transmission. It originally hooked to your caeb linkage and the slotted portion bolted to a bracket that bolted to your intake. You could adjust it to where the trans would down shift when you stepped on the throttle. You can still adjust it now, just pull it out a little and put a wire tie or something to hold it in place. It should be pulled out some anyway, it provides extra pressure to the clutch packs. If pulled out all of the way it may not shift into 3rd until 40-50 mph or so.

nomad0231 · 09-20-2009, 11:47 AM

Quote:

Originally Posted by haminator

It is the kick down cable from your T-350 transmission. It originally hooked to your caeb linkage and the slotted portion bolted to a bracket that bolted to your intake. You could adjust it to where the trans would down shift when you stepped on the throttle. You can still adjust it now, just pull it out a little and put a wire tie or something to hold it in place. It should be pulled out some anyway, it provides extra pressure to the clutch packs. If pulled out all of the way it may not shift into 3rd until 40-50 mph or so.

Wow! You all are truly great! That makes sense! Last night I was driving it and it seemed liked it took FOREVER to shift!! So, the orignal tranny was replaced with a 700R4. (I think) Anyhow, so I put this on the drivers side of the carb, where??? Thanks again everyone!!!

**oldgold70c10** · 09-20-2009, 12:21 PM

If it is the trans cable for a 700R4 then it is not just a kick-down cable, it is THE cable that controls the whole transmission and how and when it shifts. Not having it hooked up or adjusted right will seriously shorten the life of the transmission!!

If you don't know which transmission it is, go under the truck and loock at the oil pan on the transmission. The 350 trans. has a square oil pan with a corner angled off, while the 700R4 has a funky shaped pan. If its been working for a while you probably got a 350, but you better double check and look at the pan.

fixit-p · 09-20-2009, 12:46 PM

If it is the TV cable it needs to be properly adjusted here's a link
http://www.tciauto.com/Products/Inst...ble_adjust.htm

nomad0231 · 09-20-2009, 12:49 PM

Quote:

Originally Posted by oldgold70c10

If it is the trans cable for a 700R4 then it is not just a kick-down cable, it is THE cable that controls the whole transmission and how and when it shifts. Not having it hooked up or adjusted right will seriously shorten the life of the transmission!!

If you don't know which transmission it is, go under the truck and loock at the oil pan on the transmission. The 350 trans. has a square oil pan with a corner angled off, while the 700R4 has a funky shaped pan. If its been working for a while you probably got a 350, but you better double check and look at the pan.

Ok, just looked. It is square with a corner angled off. I could've swore the "engine guy" who just rebuilt the 350 and the tranny told me it was a 700r4. So what should I do with this cable? I don't want to just leave it dangling.

Also, I looked at the carb and noticed the engine guy put a sizp tie around a floaty looking thing (like that term?!?)

powerdriver 1958 · 09-20-2009, 01:44 PM

this may help

**oldgold70c10** · 09-20-2009, 02:00 PM

Quote:

Originally Posted by nomad0231

Ok, just looked. It is square with a corner angled off. I could've swore the "engine guy" who just rebuilt the 350 and the tranny told me it was a 700r4. So what should I do with this cable? I don't want to just leave it dangling.

Also, I looked at the carb and noticed the engine guy put a sizp tie around a floaty looking thing (like that term?!?)

You should have a bracket on the intake manifold on the driver's side of the engine. There should also be a place on the carb to clip the cable, or a hole where a stud screws in to clip it on.
Here are some picks:

nomad0231 · 09-21-2009, 09:23 PM

Quote:

Originally Posted by oldgold70c10

You should have a bracket on the intake manifold on the driver's side of the engine. There should also be a place on the carb to clip the cable, or a hole where a stud screws in to clip it on.
Here are some picks:

That picture was SO helpful! THANK YOU! This is why i'm so glad I bought a '67, I knew there would be outstanding support from this community!!

How much should this be pulled out? I pushed it in some, but it still doesn't shift to 3rd until about 35, seems late doesn't it?

**425HP409** · 09-22-2009, 10:50 PM

To adjust the detent cable for your TH350 transmission, with the throttle wide open, pull the cable all the way out and connect it in that position. Your transmission then will have proper pressure and should have detent, or passing gear when throttle is depressed to the floor. The transmission also has a vacuum line from the intake manifold to the vacuum modulator that controls the speed when it upshifts and the relative firmness of the shift. The vacuum line from the modulator must be connected to manifold vacuum (full vacuum at idle). If the transmssion shifts too late or soon, the vacuum modulator may be bad. If trans fluid is present where the vacuum hose connects to it, it is bad. Unless you have an original large diameter vacuum modulator, it is adjustable to fine tune the shifts. To adjust the shifts, remove the vacuum hose from the modulator, with a small screwdriver, turn the screw inside the vacuum port. To raise the points and firmness, turn the screw in (clockwise). To lower and soften the shifts, turn the screw out (counterclockwise). Test drive after each adjustment. I would do a half turn at a time until you have it where you want it.

*highperf4x4* · 09-23-2009, 02:41 PM

Ok, thx

Razr · 11-05-2009, 12:54 AM

can some plz post a pic of the switch on the gas pedal for the TH 400 transmission.Where is the electric switch located.......

*highperf4x4* · 11-05-2009, 01:39 AM

I broke my camera last week but I'll see if my phone can take a good enough pic tomorrow.

Razr · 11-05-2009, 02:29 AM

thanx

screamin_c10 · 11-05-2009, 12:15 PM

"can some plz post a pic of the switch on the gas pedal for the TH 400 transmission.Where is the electric switch located....... "

This is the setup on my 67, 327 4jet TH400.....Hope it helps

Mertz · 11-05-2009, 12:30 PM

If I set mine up with the throttle wide open it wants to shift down at odd times. If I pull on the cable it moves all the way out but then if I pull a little harder it move another 1/4" or so. Do I set it so I have it completely out or just before the extra movement. BTW my 350 was just rebuilt so eveything should be working correctly. I just switched from and Edelbrock to a Q-jet so the length of the linkage to the carb is different. It had a small extention on the linkage to make it work for the Edelbrock but it is to tight if I hook it up directly to the Q-jet.

Razr · 11-05-2009, 01:56 PM

here is how mine is setup can someone plz help identify switch

71swb4x4 · 11-05-2009, 02:06 PM

Quote:

Originally Posted by Razr

here is how mine is setup can someone plz help identify switch

No switch that I can see in those pictures. If you have a TH400 the switch should be on the gas pedal.

Sinister · 11-05-2009, 02:07 PM

Quote:

Originally Posted by 71swb4x4

No switch that I can see in those pictures. If you have a TH400 the switch should be on the gas pedal.

Some had the switch at the carb.

fixit-p · 11-05-2009, 02:32 PM

Quote:

Originally Posted by Razr

here is how mine is setup can someone plz help identify switch

it's the switch with the orange and yellow wire in screamin's post. That sw wont work on an Edelbrock carb you can use a Lokar kick down switch or a nitrous wide open throttle switch.

http://www.summitracing.com/parts/LOK-KD2400HT/

http://www.summitracing.com/parts/EDL-72280

jd4300fel · 11-05-2009, 04:19 PM

does anyone happen to know where this connects to on the tranny ? I was under the impression that the 400 only used vacum.

Sinister · 11-05-2009, 04:23 PM

Quote:

Originally Posted by jd4300fel

does anyone happen to know where this connects to on the tranny ? I was under the impression that the 400 only used vacum.

There's an electrical connector on the driver's side of the transmission.

Razr · 11-05-2009, 07:08 PM

Thanx...Sinister......By the way do you know any good mechanics in the Los Angeles, South bay area. I need a good mechanic who knows about these trucks or older vehicles.

09-20-2009, 11:10 AM	#1
nomad0231 Registered User Join Date: Sep 2007 Location: jacksonville nc Posts: 142	Choke? What is this in the pic?! Ok. So, I know very little about engines, but am trying to learn! Yesterday, me and a friend put on some ceramic coated long tube headers ($186 from Summit!!) Anyways, I noticed this linkage, its in the pic. I can pull on it a little bit. What is this??!? I have trouble with starting when cold, takes a long time to get it to turn over. I bought an Edelbrock 60 w/ elec choke from a board member and hope it fixes the start problem. BUT WHAT IS THIS THING?!?! Attached Images Last edited by nomad0231; 09-20-2009 at 11:10 AM.

09-20-2009, 11:12 AM	#2
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,713	Re: Choke? What is this in the pic?! Looks like the kickdown for an auto trans. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

09-20-2009, 11:33 AM	#3
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: Choke? What is this in the pic?! Transmission kick down cable, it hooks up on the drivers side of the carb. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

09-20-2009, 11:36 AM	#4
haminator Registered User Join Date: Sep 2009 Location: Prescott Valley AZ Posts: 345	Re: Choke? What is this in the pic?! It is the kick down cable from your T-350 transmission. It originally hooked to your caeb linkage and the slotted portion bolted to a bracket that bolted to your intake. You could adjust it to where the trans would down shift when you stepped on the throttle. You can still adjust it now, just pull it out a little and put a wire tie or something to hold it in place. It should be pulled out some anyway, it provides extra pressure to the clutch packs. If pulled out all of the way it may not shift into 3rd until 40-50 mph or so.

09-20-2009, 12:21 PM	#6
oldgold70c10 Who's got steelies? Join Date: Feb 2006 Location: Morrison, Oklahoma Posts: 1,026	Re: Choke? What is this in the pic?! If it is the trans cable for a 700R4 then it is not just a kick-down cable, it is THE cable that controls the whole transmission and how and when it shifts. Not having it hooked up or adjusted right will seriously shorten the life of the transmission!! If you don't know which transmission it is, go under the truck and loock at the oil pan on the transmission. The 350 trans. has a square oil pan with a corner angled off, while the 700R4 has a funky shaped pan. If its been working for a while you probably got a 350, but you better double check and look at the pan. __________________ 1969 C10 LWB W/ 250 I6 & 3spd 1970 C10 with '67 small window cab, 68 front end, blue; 305/TH350, 3.08 limited slip rear end, manual brakes, power steering; & 4-wheel drums-My daily driver. 1975 Chevelle Malibu Classic Coupe 350/th350 mint green 1970 C20 Suburban 350/700R4 4.10 gearing green & white 1978 Big 10 Silverado 350/th350, working ac, 2 tone blue-My summer daily driver 1983 GMC 1500 Sierra 305/SM465 2.73 rear end How to add a trip odometer to your 67-72 stock speedometer How to rebuild your Q-Jet My Truck Page My Youtube Channel

09-20-2009, 01:44 PM	#9
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: Choke? What is this in the pic?! this may help Attached Images

09-22-2009, 10:50 PM	#12
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 841	Re: Choke? What is this in the pic?! To adjust the detent cable for your TH350 transmission, with the throttle wide open, pull the cable all the way out and connect it in that position. Your transmission then will have proper pressure and should have detent, or passing gear when throttle is depressed to the floor. The transmission also has a vacuum line from the intake manifold to the vacuum modulator that controls the speed when it upshifts and the relative firmness of the shift. The vacuum line from the modulator must be connected to manifold vacuum (full vacuum at idle). If the transmssion shifts too late or soon, the vacuum modulator may be bad. If trans fluid is present where the vacuum hose connects to it, it is bad. Unless you have an original large diameter vacuum modulator, it is adjustable to fine tune the shifts. To adjust the shifts, remove the vacuum hose from the modulator, with a small screwdriver, turn the screw inside the vacuum port. To raise the points and firmness, turn the screw in (clockwise). To lower and soften the shifts, turn the screw out (counterclockwise). Test drive after each adjustment. I would do a half turn at a time until you have it where you want it. __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette

09-23-2009, 02:41 PM	#13
highperf4x4 Account Suspended Join Date: Apr 2009 Location: Oklahoma City Posts: 4,709	Re: Choke? What is this in the pic?! Ok, thx

11-05-2009, 12:54 AM	#14
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Re: Choke? What is this in the pic?! can some plz post a pic of the switch on the gas pedal for the TH 400 transmission.Where is the electric switch located.......

11-05-2009, 01:39 AM	#15
highperf4x4 Account Suspended Join Date: Apr 2009 Location: Oklahoma City Posts: 4,709	Re: Choke? What is this in the pic?! I broke my camera last week but I'll see if my phone can take a good enough pic tomorrow.

11-05-2009, 02:29 AM	#16
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Re: Choke? What is this in the pic?! thanx

11-05-2009, 12:15 PM	#17
screamin_c10 I dun gradjiated collij!!! Join Date: Jan 2006 Location: St. Helens Oregon Posts: 1,750	Re: Choke? What is this in the pic?! "can some plz post a pic of the switch on the gas pedal for the TH 400 transmission.Where is the electric switch located....... " This is the setup on my 67, 327 4jet TH400.....Hope it helps Attached Images __________________ Built NOT Bought. Viper Red 1971 LWB C10 355 Vortec W/700R4 4/5 drop AKA Screamin' You are missed! 2006 F150 XLT 5.4L Triton Rollin' on 22s the "F1" 67 C20 PS/AC/327/TH400 we call 'er "Bessie" 67 Malibu PS/ZR1-LS1 Brakes/350 Vortec/700R4 2/2 drop on 18" 338s - Tracy's "Boo" Boosted '67 Cougar EFI 5.0 HO roller motor/T5/8.8 Tracloc/ 4 wheel disks - "Project Panther" 79 Honda Z50 - stretched, cafe'd and hotrodded 125CC Lifan/5spd FEAR THE MONKEY! Last edited by screamin_c10; 11-05-2009 at 03:04 PM.

11-05-2009, 12:30 PM	#18
Mertz Registered User Join Date: Aug 2007 Location: Reardan, WA Posts: 132	Re: Choke? What is this in the pic?! If I set mine up with the throttle wide open it wants to shift down at odd times. If I pull on the cable it moves all the way out but then if I pull a little harder it move another 1/4" or so. Do I set it so I have it completely out or just before the extra movement. BTW my 350 was just rebuilt so eveything should be working correctly. I just switched from and Edelbrock to a Q-jet so the length of the linkage to the carb is different. It had a small extention on the linkage to make it work for the Edelbrock but it is to tight if I hook it up directly to the Q-jet.

11-05-2009, 01:56 PM	#19
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Re: Choke? What is this in the pic?! here is how mine is setup can someone plz help identify switch Last edited by Razr; 11-05-2009 at 01:58 PM. Reason: cuz

11-05-2009, 04:19 PM	#23
jd4300fel Registered User Join Date: Aug 2002 Location: wheatland, Ca Posts: 427	Re: Choke? What is this in the pic?! does anyone happen to know where this connects to on the tranny ? I was under the impression that the 400 only used vacum. __________________ Mike K Friend of Bill W



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11-05-2009, 07:08 PM	#25
Razr Registered User Join Date: Jan 2008 Location: Hawthorne,CA Posts: 114	Re: Choke? What is this in the pic?! Thanx...Sinister......By the way do you know any good mechanics in the Los Angeles, South bay area. I need a good mechanic who knows about these trucks or older vehicles.

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