[fogrocker]

anyone using a mid 80's (84) 700R4 without the computer. Looking for how to control the lockup. I know how to release the lockup thru brake light switch and low vacuum switch but not how to tell the trans WHEN to lockup.
Not looking for a link to the 80-125 dollar kits, looking to do it myself.
I saw the wiring diagram in the stickies but I don't think that will work will it? that one is assuming you have the ecm/pcm right?

Thanks

[Crosley]

Originally Posted by fogrocker

I saw the wiring diagram in the stickies but I don't think that will work will it? that one is assuming you have the ecm/pcm right?

Thanks

no , you are incorrect in the thinking on the sticky info

[fogrocker]

so that wiring circuit will work....
pin A?
No computer whatso ever...

Cool

[cool rockin daddy]

What am I missing here. In '84 the transmissions were 2004R's. No computer control at all.

[Crosley]

Originally Posted by cool rockin daddy

What am I missing here. In '84 the transmissions were 2004R's. No computer control at all.

you are missing the fact you are incorrect.

there were 700r4 trans in 1984 and earlier

[fogrocker]

Drive train is from a 84 z 28
305/700R4

[Crosley]

the 1984 trans will have many switches and wires on the valve body.

the 12 volt power to pin "A" and a ground wire to "D" may not provide lock up of the converter clutch

[cool rockin daddy]

'84 the first year for the 700?

[fogrocker]

Originally Posted by Crosley

the 1984 trans will have many switches and wires on the valve body.

the 12 volt power to pin "A" and a ground wire to "D" may not provide lock up of the converter clutch

Ok... im lost... I said that the diagram would not work for my trans without other mods... you said I was wrong, implying that the diagrammed circuit would work... now you say that it wont work... I'm configeled now...

[Crosley]

Originally Posted by fogrocker

Ok... im lost... I said that the diagram would not work for my trans without other mods... you said I was wrong, implying that the diagrammed circuit would work... now you say that it wont work... I'm configeled now...

nope,

your comment was :

I saw the wiring diagram in the stickies but I don't think that will work will it? that one is assuming you have the ecm/pcm right?

No PCM - ECM is required. The sticky shows a wire to hook up to 12 volt source. That can be any 12 volt source with the ignition in the "run" posiition.

You need 12 volts to the lock up solenoid and a method to provide a ground if the solenoid is a 2 wire solenoid.

Your old trans 1984, may have a 1 wire solenoid. There may be a proper pressure switch currently on your valve body. You need a "N-O" switch. N-O mean normally open.

Pressure switch in the proper v-body hole for lock up in over-drive and you are good to go.

I would suggest trying the 12 volt wire in to the "A" pin hole and ground wire in to the "D" pin hole. The transmission may lock up the converter in 4th gear only or it may lock the converter up in 2 , 3 and 4th gears as the early 700r4 was setup like that

[Crosley]

here is a page in the Crankshaft Wiki with photos , better explanation :

clik here