TC lockup kit will this brake light switch work in my 67 C-10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72farmer · 07-12-2010, 06:35 AM

I have a 700R4 transmission in my 67 C-10 that i am going to have rebuilt this week.It did not have the lock up torque converter hooked up.Will the brake light switch in this kit fit my 67 C-10?I tried to post the page on the wiring kit and did not know how.It is Painless Wiring kit part#60109 Please help ASAP

**michael bustamante** · 07-12-2010, 12:48 PM

can you post a link?
Im using a brake light switch from an 80`s model truck with cruise. It slips right in and easy to wore up, but im interested to see what you found

raycow · 07-13-2010, 03:24 AM

Does the switch have 4 terminals, with one pair N/C and the other N/O?

Ray

eagleuh1 · 07-13-2010, 08:06 AM

The brake light switch looks like it will fit and have the connectors for brake lights and torque converter lockup. The rest of the stuff in the kit don't know about, never worked on 700r4. Good luck.

**michael bustamante** · 07-13-2010, 12:10 PM

yes the 80`s chevy switch has the normally open /normally closed circuitry in it as well and it fits like factory, I just cut off the connectors and soldered on the new wiring

BarryB · 07-13-2010, 02:33 PM

This as struck my interests, can somebody explain why/what the brake light switch does for the 700r4 converter.

vasquezmrysvll · 07-13-2010, 03:08 PM

what the switch does is unlock the lock up type torque converter, when you apply the brakes. without it your vehicle would stall out when you came to a stop, similar to trying to stop a standard transmission vehicle without applying the clutch.

raycow · 07-13-2010, 03:27 PM

Quote:

Originally Posted by BarryB

This as struck my interests, can somebody explain why/what the brake light switch does for the 700r4 converter.

The brake light switch has an extra set of contacts that opens the clutch circuit when you step on the brake pedal. I think the intent was to keep the engine from stalling in case you lock the rear wheels at speed.

The engine won't stall when the car is stopped because the clutch cannot engage when the transmission is in 1st gear. This feature is incorporated into the valve body design. I have wired the lockup circuit without the brake switch and did not have any problems.

Ray

vasquezmrysvll · 07-13-2010, 03:40 PM

switch went bad in my 85 iroc and it would stall out at a stop? changed switch and had no more problems?

raycow · 07-13-2010, 04:29 PM

If you had a stock valve body, I have no explanation for that. The converter clutch really is not supposed to engage in 1st gear.

Ray

vasquezmrysvll · 07-13-2010, 04:37 PM

but if your at speed and apply the brakes to stop, switch in-op, the converter will stay locked up in any gear, od down threw 1st. there will be no signal telling it to unlock. i think?

raycow · 07-13-2010, 04:56 PM

Yes, that would definitely happen if you locked up the rear wheels at speed. The transmission wouldn't have time to downshift and the engine would die. That's why I think the switch was included on the factory installations.

Ray

07-12-2010, 06:35 AM	#1
72farmer Registered User Join Date: May 2009 Location: Hazel Green AL Posts: 286	TC lockup kit will this brake light switch work in my 67 C-10 I have a 700R4 transmission in my 67 C-10 that i am going to have rebuilt this week.It did not have the lock up torque converter hooked up.Will the brake light switch in this kit fit my 67 C-10?I tried to post the page on the wiring kit and did not know how.It is Painless Wiring kit part#60109 Please help ASAP

07-12-2010, 12:48 PM	#2
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,848	Re: TC lockup kit will this brake light switch work in my 67 C-10 can you post a link? Im using a brake light switch from an 80`s model truck with cruise. It slips right in and easy to wore up, but im interested to see what you found __________________ 1967custom

07-13-2010, 03:24 AM	#3
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: TC lockup kit will this brake light switch work in my 67 C-10 Does the switch have 4 terminals, with one pair N/C and the other N/O? Ray

07-13-2010, 08:06 AM	#4
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: TC lockup kit will this brake light switch work in my 67 C-10 The brake light switch looks like it will fit and have the connectors for brake lights and torque converter lockup. The rest of the stuff in the kit don't know about, never worked on 700r4. Good luck.

07-13-2010, 12:10 PM	#5
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,848	Re: TC lockup kit will this brake light switch work in my 67 C-10 yes the 80`s chevy switch has the normally open /normally closed circuitry in it as well and it fits like factory, I just cut off the connectors and soldered on the new wiring __________________ 1967custom

07-13-2010, 02:33 PM	#6
BarryB Senior Member Join Date: Jul 2006 Location: Blountville, Tn. Posts: 3,904	Re: TC lockup kit will this brake light switch work in my 67 C-10 This as struck my interests, can somebody explain why/what the brake light switch does for the 700r4 converter. __________________ We could learn a lot from crayons... Some are sharp; some are pretty;and some are dull. Some have weird names; and all are different colours;but they all have to live in the same box. You may be only one person in the world, But you may also be the world to one person. * Some mistakes are too much fun to only make once. Two rules in life. 1. Never sweat the small stuff! 2. Everything is small stuff!

07-13-2010, 03:08 PM	#7
vasquezmrysvll "the other guy" Join Date: Oct 2008 Location: Olivehurst California 95961 Posts: 901	Re: TC lockup kit will this brake light switch work in my 67 C-10 what the switch does is unlock the lock up type torque converter, when you apply the brakes. without it your vehicle would stall out when you came to a stop, similar to trying to stop a standard transmission vehicle without applying the clutch. __________________ God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE"

07-13-2010, 03:40 PM	#9
vasquezmrysvll "the other guy" Join Date: Oct 2008 Location: Olivehurst California 95961 Posts: 901	Re: TC lockup kit will this brake light switch work in my 67 C-10 switch went bad in my 85 iroc and it would stall out at a stop? changed switch and had no more problems? __________________ God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE"

07-13-2010, 04:29 PM	#10
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: TC lockup kit will this brake light switch work in my 67 C-10 If you had a stock valve body, I have no explanation for that. The converter clutch really is not supposed to engage in 1st gear. Ray

07-13-2010, 04:37 PM	#11
vasquezmrysvll "the other guy" Join Date: Oct 2008 Location: Olivehurst California 95961 Posts: 901	Re: TC lockup kit will this brake light switch work in my 67 C-10 but if your at speed and apply the brakes to stop, switch in-op, the converter will stay locked up in any gear, od down threw 1st. there will be no signal telling it to unlock. i think? __________________ God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE"

07-13-2010, 04:56 PM	#12
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: TC lockup kit will this brake light switch work in my 67 C-10 Yes, that would definitely happen if you locked up the rear wheels at speed. The transmission wouldn't have time to downshift and the engine would die. That's why I think the switch was included on the factory installations. Ray



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