Choke? What is this in the pic?!

[nomad0231]

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]

Looks like the kickdown for an auto trans.

[BLACK AND BLUE 67-72]

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

[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.

[nomad0231]

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]

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]

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]

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]

this may help

[oldgold70c10]

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]

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]

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]

Originally Posted by 425HP409

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.

Will this also apply to a th400? Mine is a little soft on the 1-2 shift but firm on the 2-3 shift. I would like it to stretch a little more between shifts too.

I don't have a kick down cable though. Just a switch mounted beside the gas pedal.

[425HP409]

On a TH400 transmission, there is no cable. The TH400 uses an electric kickdown, hence the switch on the gas pedal and a wire running down to the left side of the transmission. The vacuum modulator is responsible for upshift timing and feel, and part throttle downshifts, whereas the electric solenoid is responsible for full throttle downshifts. the modulator can be adjusted just like one on a TH 350. If adjusting it doesn't do what you want, you may have to have a transmission shop look at it for a repair or adjustment in the valve body or servo.

[highperf4x4]

Ok, thx

[Razr]

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]

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

[Razr]

thanx

[screamin_c10]

"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]

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]

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

[71swb4x4]

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]

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]

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]

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