200r4 Lock up wiring basics - Chevelle Tech
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Transmission & Driveline Transmissions and Differentials

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  #1  
Old Jul 21st, 12, 3:57 PM
steve_sutherland steve_sutherland is online now
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Default 200r4 Lock up wiring basics

I have been searching and for the most part I understand what to do. I will be putting 12 volt power to the solenoid from the brake light switch. The problem that I have is that I need to go about two steps back from that.

For the brake light switch, I have read that it works well to use a more late model switch from a car that came with a lock up TC. Specifically one that has NO for brake lights, and NC for the converter. Will any of the switches from the mid 80's monte carlo work? It is going into a 70 El Camino.

As for the other end, where is the solenoid and what is the best way to add the 12v power to it? Is it the 4 pin connector on the driver's side?

Will that really be all that is required to have 4th gear lockup?

Thanks for your time, I appreciate the help. I have been searching, but don't find much in the way of basics.
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Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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  #2  
Old Jul 21st, 12, 5:36 PM
Mike Mike is offline
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Default Re: 200r4 Lock up wiring basics

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  #3  
Old Jul 21st, 12, 11:22 PM
steve_sutherland steve_sutherland is online now
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Default Re: 200r4 Lock up wiring basics

Thanks a lot Mike! That is a huge help. For the section inside the transmission, do I have to wire that, or is it factory wired?

I really don't know much about wiring/electrical. Is there a specific type of relay to use? Does it have to be used?

If I recall correctly, the plug on the transmission case has 4 spots in a square configuration. How does the diagram translate to the 4 pin connector?

Finally, does a manifold vacuum switch have to be used? What sort of vacuum switch do I need to find or use? Is it possible to do it without the vacuum switch?

I apologize for all of the stupid questions.
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70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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Old Jul 21st, 12, 11:36 PM
dream66 dream66 is offline
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Default Re: 200r4 Lock up wiring basics

Hey, how 'bout a 700R4 wiring diagram?
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  #5  
Old Jul 21st, 12, 11:50 PM
77 cruiser 77 cruiser is offline
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Default Re: 200r4 Lock up wiring basics

In place of the relay you can you the brake switch from a car that has cruise.
The switch is normally close push the brake cuts the power.
Hook the vac. switch to ported cuts the power when off the gas.
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Old Jul 22nd, 12, 5:30 AM
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Default Re: 200r4 Lock up wiring basics

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Originally Posted by 77 cruiser View Post
In place of the relay you can you the brake switch from a car that has cruise.
The switch is normally close push the brake cuts the power.
Hook the vac. switch to ported cuts the power when off the gas.
I use that setup minus the vacuum switch. Works fine for me. I keep it in D3 around town on short trips under 50 mph anyway so it's not constantly shifting in and out of OD. I just use OD out on the highway.
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  #7  
Old Jul 22nd, 12, 9:47 AM
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Default Re: 200r4 Lock up wiring basics

So it is okay to do without the vacuum switch?
Von, what brake switch did you use. Any idea of a specific vehicle reference?

Thanks a lot to everyone for your input so far.
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70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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Old Jul 22nd, 12, 11:35 AM
von von is offline
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Default Re: 200r4 Lock up wiring basics

Yes it's OK to go without the vacuum switch. You might have to put up with a little lugging of the engine before it downshifts to 3rd but you can always add the vaccum switch later if desired. The 4th gear pressure switch I used is GM pn 8643710. I thought I had the brake switch pn handy but couldn't find it. PM SSuper Dave who has the GM pn I used. I bought both switches from www.gmpartsdirect.com. Much cheaper than a dealer.
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  #9  
Old Jul 22nd, 12, 11:47 AM
Mike Mike is offline
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Default Re: 200r4 Lock up wiring basics

Gus ,there's a bunch on Google.
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  #10  
Old Jul 24th, 12, 4:23 PM
steve_sutherland steve_sutherland is online now
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Default Re: 200r4 Lock up wiring basics

Where and how do I wire the power to the tcc solenoid? There is a 4 pin connector on the side of the trans. It looks like I maybe need the top left one? Do I just hook power to it? Do I need to worry about a ground?
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23 years old
70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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  #11  
Old Jul 24th, 12, 4:34 PM
fleming23 fleming23 is offline
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Default Re: 200r4 Lock up wiring basics

Quote:
Originally Posted by steve_sutherland View Post
So it is okay to do without the vacuum switch?
Von, what brake switch did you use. Any idea of a specific vehicle reference?

Thanks a lot to everyone for your input so far.
This is what I used for my brake switch

Autozone part # 80176 - listed for a 70 Chevelle.



I also installed the B&M Lock up controller and it made driving around town SOO much better! You have a dial where you can set the speed at which the converter locks up so you can be in 4th gear unlocked, hit 60mph and bam it locks. Guess it was a waste of money now that I am taking the 200-4 out of the car in place of the 4L80E. Really with the B&M Controller you don't need the vacuum switch or the brake switch (just wire in your 12v and go) as the converter will unlock at anything below your desired speed. Although it does cost a good bit more....
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  #12  
Old Jul 24th, 12, 10:56 PM
steve_sutherland steve_sutherland is online now
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Default Re: 200r4 Lock up wiring basics

I was considering the B and M controller, it was just budget that held me back on it.

How well did the 200r4 like that 496"?

If you don't mind me asking specifics, how did you wire up the 12v power on the trans end?

Also thank you for the brake switch part number, Im ordering on in tomorrow on my lunch break
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23 years old
70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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  #13  
Old Jul 26th, 12, 7:30 AM
steve_sutherland steve_sutherland is online now
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Default Re: 200r4 Lock up wiring basics

Ive got the brake light switch. I just realized that although the connector is square with 4 spots, it is the white connector with 3 pins. So now I know which one is power, A terminal on the bottom left.

Do I need anything on the top left or top right?
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23 years old
70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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  #14  
Old Jul 26th, 12, 7:31 AM
steve_sutherland steve_sutherland is online now
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Default Re: 200r4 Lock up wiring basics

I'm also pretty sure that my TH350 driveshaft is too long as well... I have tried jacking from the differential to compress the rear suspension with no luck.
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23 years old
70 El Camino-355", 10:1, Sportsman 2's, Voodoo cam, 200r4, 3000 stall, 3.73's
Front- http://i282.photobucket.com/albums/k...06710511_1.jpg
Rear- http://i282.photobucket.com/albums/k...kprimer001.jpg
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  #15  
Old Jul 26th, 12, 7:58 AM
novaderrik novaderrik is offline
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Default Re: 200r4 Lock up wiring basics

a TH350 and 200-4r trans are the same overall length with the same splines on the output shaft, so the driveshaft is a plug and play deal..

regarding the wiring- use google to find some wiring diagrams.. there are a lot of them out there.. if you have a trans from an 87-87 turbocharged Regal or GN, then it will also be wired with a 3rd gear pressure switch so you can lock it up in third, too.. those trannies use a slightly different plug than every other rwd overdrive trans- it looks almost the same, but it's black instead of white and it won't plug into a trans that is only wired for a 4th gear pressure switch.
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