Author Topic: 1986 Transmission with wires torque converter lock up?  (Read 342 times)

Offline Harmon

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1986 Transmission with wires torque converter lock up?
« on: June 02, 2019, 01:22:00 PM »
I have a 86 Chevy c10 that had 305 but was converted to 350.

I am attempting to hook up my torque converter lock up switch.  I do not know the appropriate area to get vacuum to it.

I also do not know what type of trans i have.  It is my understanding I have wires going to my tranny, problem is I can look under truck at the moment.


Offline JohnnyPopper

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #1 on: June 03, 2019, 10:15:24 PM »
Hey man, gotta start with basics.

You need to know what type of trans you have before anyone can help you.

Take pics and post, that is a good start.

Offline Harmon

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #2 on: June 05, 2019, 10:01:01 AM »
Yeah, good point, I do not know what I have as I cannot crawl under truck at the moment where it is parked.  I know it cant be a 400 I assume since it had a 305 originally.

Offline JohnnyPopper

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #3 on: June 05, 2019, 05:53:27 PM »
If you have wiring going to the trans, it might be a 700r 4 speed with overdrive. A good one to have! If you can snap a pic from both profiles I'm sure someone on this forum can help you ID.

Offline DanMcG

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #4 on: June 06, 2019, 04:28:42 AM »
What does the gear selector on the column look like? A 700 would have the D in a circle.

Offline Harmon

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #5 on: June 06, 2019, 01:44:38 PM »
The D has more like a square around it, I assume that is the circle you speak of?

Offline JohnnyPopper

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #6 on: June 06, 2019, 03:24:31 PM »
I think that's it. If it's not Overdrive there is no circle/square.

Offline Harmon

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #7 on: June 09, 2019, 09:28:05 AM »
Ok, I threw cardboard down, and braved the tall grass to see I have a square pan trans.  That according to what was said above, and my book indicates a 700-R4.

I "found out" I have a lock up torque converter...I do not believe it was hooked up.  I have the lock up switch/Vacuum thing on the firewall.  I have to plug that into the carb to get the correct vacuum do make this work?

I also noticed there is a "Boot" looking connection hanging down under truck on right side. 

What is yall's thought to those 2 items?

Thank you.

Offline Harmon

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #8 on: June 09, 2019, 09:34:23 AM »
I guess I dont really know what is suppose to be connected to the trans besides, Speedo cable, trans cooler lines, and this TV cable (which at one point I think i saw on the right side of my trans?)

Offline Harmon

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #9 on: June 09, 2019, 11:04:57 AM »
Ok I think I figured it out.  The lock up converter is connected electrically on the left side of trans. 

Offline JohnnyPopper

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Re: 1986 Transmission with wires torque converter lock up?
« Reply #10 on: June 10, 2019, 09:34:44 PM »
Good job Harmon!

I have transmission envy... would love to have one like it on my K10.

I got nothin on where to hook up your electric or vacuum, look to the other guys on this forum to assist. They are a great resource.

BTW, the search engine is pretty potent; use it for vac diagrams, as well as electric.