what is this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

3r!c84 · 10-04-2010, 10:49 PM

what is this and do i need it?

84 c10 305/th350c was on the pass top fire wall. has a vacuum line hooked up to it.

**N2TRUX** · 10-04-2010, 10:54 PM

Torque converter lock/unlock

3r!c84 · 10-04-2010, 11:01 PM

so i still need it, i relocate it tho

gchemist · 10-04-2010, 11:25 PM

Torque converter lock up is the driverside wall. The one on the passenger is part of the ESC system.

3r!c84 · 10-04-2010, 11:27 PM

dont need one like this on the drivers side? and whats ESC system? do i need it

*nbpro* · 10-04-2010, 11:44 PM

ESC system Electric Spark Control

converter lock/unlock is part of the 350thc

3r!c84 · 10-04-2010, 11:57 PM

im going to be running a msd system so i wll not be needing the ESC then?

and i didnt see anything like that on the other side for the converter lockup

3r!c84 · 10-05-2010, 12:04 AM

better pic to see where its at

*nbpro* · 10-05-2010, 12:24 AM

Try circling it, because I can't tell from that pic. It's a possibility that someone bypassed your's. Is that a stock carb you're running?

*scottsdaleowner75* · 10-05-2010, 12:27 AM

By chance can you take a pic of where the vacuum line goes to? I have the same thing on my 86's but i dont know where the vacuum hose goes

*nbpro* · 10-05-2010, 12:28 AM

http://www.msdignition.com/forum/index.php?

http://www.73-87.com/7387garage/drivetrain/escrepl.htm

gchemist · 10-05-2010, 05:10 AM

Here is a better picture from my 83 original configuration.

I removed it along with all the ECS wiring harness.

Look straight up from the top left corner of the brake oil cover. Right above it is the lock switch for a 700R4. The red wire goes around it. The lockup switch is on the bottom right corner of the fusible link junction open box.

3r!c84 · 10-05-2010, 11:14 AM

Quote:

Originally Posted by nbpro

Try circling it, because I can't tell from that pic. It's a possibility that someone bypassed your's. Is that a stock carb you're running?

it has a stock carb i will not be using the stock carb with the new motor

Quote:

Originally Posted by gchemist

Here is a better picture from my 83 original configuration.

I removed it along with all the ECS wiring harness.

Look straight up from the top left corner of the brake oil cover. Right above it is the lock switch for a 700R4. The red wire goes around it. The lockup switch is on the bottom right corner of the fusible link junction open box.

ive got TH350C so there should be a lockup converter switch instead. what consists of the whole ESC wiring harness?

dropd80s · 10-05-2010, 12:45 PM

Quote:

Originally Posted by 3r!c84

what consists of the whole ESC wiring harness?

As best I rememeber, everything coming out of the large grommit directly behind the motor (slightly towards the pass side) should be the ESC harness. Should have a plug for the dist., knock sensor wire, ect. Inside it will run to a small box like a computer. Unplug the harness from the box and remove.

*nbpro* · 10-05-2010, 12:48 PM

Complete 73-87 Wiring Diagrams

3r!c84 · 10-05-2010, 01:25 PM

Sweet thanks I'll check it out when I get home it's hard on my iPhone
Posted via Mobile Device

3r!c84 · 10-05-2010, 10:24 PM

ok i looked over the diagram and it said nothing about the ESC system or about what i had.

gchemist · 10-06-2010, 12:16 AM

Go to www.autozone.com. You'll find emissions diagrams there with the switch.

Alan_S · 04-16-2011, 10:52 PM

I have a 1986 c10 with a 1970 307 and turbo 350 I saved the truck from being a parts truck and installed the motor. In a nutshell I have a torque converter lock but I have no idea where the line goes to even after looking at the picture above and buying a book at the auto parts store. I do have two of them it appears and the ball and some lines but I need some advice on where they all go. My motor is simple I have the basic motor and carb no sensors for smog or emissions are installed.

10-04-2010, 10:49 PM	#1
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	what is this? what is this and do i need it? 84 c10 305/th350c was on the pass top fire wall. has a vacuum line hooked up to it. Attached Images __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-04-2010, 10:54 PM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Re: what is this? Torque converter lock/unlock __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

10-04-2010, 11:01 PM	#3
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? so i still need it, i relocate it tho __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-04-2010, 11:25 PM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: what is this? Torque converter lock up is the driverside wall. The one on the passenger is part of the ESC system. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

10-04-2010, 11:27 PM	#5
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? dont need one like this on the drivers side? and whats ESC system? do i need it __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-04-2010, 11:44 PM	#6
nbpro Account Suspended Join Date: Dec 2008 Location: Huntsville,AL Posts: 2,119	Re: what is this? ESC system Electric Spark Control converter lock/unlock is part of the 350thc

10-04-2010, 11:57 PM	#7
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? im going to be running a msd system so i wll not be needing the ESC then? and i didnt see anything like that on the other side for the converter lockup __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-05-2010, 12:04 AM	#8
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? better pic to see where its at Attached Images __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-05-2010, 12:24 AM	#9
nbpro Account Suspended Join Date: Dec 2008 Location: Huntsville,AL Posts: 2,119	Re: what is this? Try circling it, because I can't tell from that pic. It's a possibility that someone bypassed your's. Is that a stock carb you're running?

10-05-2010, 12:27 AM	#10
scottsdaleowner75 Account Suspended Join Date: Mar 2010 Location: So. Cal, Inland Empire Posts: 199	Re: what is this? By chance can you take a pic of where the vacuum line goes to? I have the same thing on my 86's but i dont know where the vacuum hose goes

10-05-2010, 12:28 AM	#11
nbpro Account Suspended Join Date: Dec 2008 Location: Huntsville,AL Posts: 2,119	Re: what is this? http://www.msdignition.com/forum/index.php? http://www.73-87.com/7387garage/drivetrain/escrepl.htm Last edited by nbpro; 10-05-2010 at 12:30 AM.

10-05-2010, 05:10 AM	#12
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: what is this? Here is a better picture from my 83 original configuration. I removed it along with all the ECS wiring harness. Look straight up from the top left corner of the brake oil cover. Right above it is the lock switch for a 700R4. The red wire goes around it. The lockup switch is on the bottom right corner of the fusible link junction open box. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos Last edited by gchemist; 10-05-2010 at 05:10 AM.

10-05-2010, 12:48 PM	#15
nbpro Account Suspended Join Date: Dec 2008 Location: Huntsville,AL Posts: 2,119	Re: what is this? Complete 73-87 Wiring Diagrams

10-05-2010, 01:25 PM	#16
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? Sweet thanks I'll check it out when I get home it's hard on my iPhone Posted via Mobile Device __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-05-2010, 10:24 PM	#17
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: what is this? ok i looked over the diagram and it said nothing about the ESC system or about what i had. __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90



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10-06-2010, 12:16 AM	#18
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: what is this? Go to www.autozone.com. You'll find emissions diagrams there with the switch. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

04-16-2011, 10:52 PM	#19
Alan_S Registered User Join Date: Apr 2011 Location: Charlotte, NC Posts: 3	Re: what is this? I have a 1986 c10 with a 1970 307 and turbo 350 I saved the truck from being a parts truck and installed the motor. In a nutshell I have a torque converter lock but I have no idea where the line goes to even after looking at the picture above and buying a book at the auto parts store. I do have two of them it appears and the ball and some lines but I need some advice on where they all go. My motor is simple I have the basic motor and carb no sensors for smog or emissions are installed.

Register or Log In To remove these advertisements.