ECU converter 200r4 lock up control

[84 El Camino 231]

That was help

[Disclaimer]: I realize this doesn't help those looking for "standalone (non ecu)" TCC lockup control, but wanted to share in cases where you have gone EFI (in my case Holley EFI) you have some really cool control of various inputs/outputs for things like this (and lots of others). My config uses an ground (-) output, and is set up to look at several sensor inputs, and also the 4th gear switched input from 700R4 trans to decide when to apply the TCC.

What I also did was configure a "TIMER" so that when ALL the conditions are met, it then also waits 3.5 secs before actually applying the TCC. A lot of simple 4th gear triggered setups will come on immediately after upshift to 4th, and then you get that chug-chug at certain low speeds, or moderate acceleration driving.

Having the TPS, MAP, RPM and Vehicle Speed all being considered allows you to get the functionality very close to factory (oem ecu) so you can tailor it to your type of driving habits and still be sure it's locked up (and releases) the way you want it. For example, it's nice that I could be cruising at about 65MPH, TCC engaged, then a slight increase in TPS to above 15% will release it and give me the added acceleration almost like a downshift without actually downshifting from 4th to 3rd.

You can see how much you can customize in screen shots below.

Here's my setup in case anyone's interested:

IMO, this was helpful info, FWIW

 

[corkatoa]

yes but u would have to turn it off every time too

Could you not rig up a circuit from, oh I don't know, maybe the brake pedal to say maybe turn off a relay? That seems doable. 🤔

 

[TURNA]

Sure but you would still have to flip that switch off so you could switch it back on

 

[corkatoa]

Sure but you would still have to flip that switch off so you could switch it back on

Ah, but....
A momentary contact switch that activates a latched relay which then could be turned off via the input from the brake. A second relay may be required but I think getting a momentary latched relay that could be toggled on/off is a possibility.

 

[corkatoa]

https://www.google.com/url?sa=t&sou...FjAgegQIBBAB&usg=AOvVaw3ZS8S7U1LU-itwl1cHTnvNI

I will be doing this eventually and I am cheap so...

There are better relays available, but this one would work.

Or maybe this

https://www.amazon.com/gp/slredirec...c406-8652-11e9-a3fd-f157ef2b5308&tag=gbody-20

 

[84 El Camino 231]

CCC TCC lockup is dependent on transmission pressure switch logic, manifold vacuum sensor voltage, coolant temp voltage, vehicle speed pulse, brake switch position and throttle position sensor voltage, as far as I know. It's independent of engine RPM I believe and not clear to me if closed loop a/f control is required but I don't think so.

 

[corkatoa]

well, when installing an o/d transmission into an old lump like mine, it is dependent on whether i wire it up to work or not...😉

but seriously, it is a pretty simple thing, direct drive when in o/d on the highway that is electronically activated. How you get that activation can be done many ways. I will wire up a momentary contact switch to a latched relay (see previous post) and then deactivate when the brake pedal is touched.

 

[84 El Camino 231]

That's another point, I'm not sure how well the 200R4 does if the TCC isn't used but it may overheat?

 

[corkatoa]

That's another point, I'm not sure how well the 200R4 does if the TCC isn't used but it may overheat?

I think that logically, any time you can take the load off the clutches, it is a good idea. Now if you are high horsepower and flogging the car at high speed, you arent going to use the lock up circuit anyways, and probably is better if you have control over it being on/off rather than allowing it to regulate itself.
But I may be wrong, and I am sure someone will have a better answer.

BTW, I may be wrong, but I do not think that all 200-4r have a lock up function.

 

[84 El Camino 231]

I think that logically, any time you can take the load off the clutches, it is a good idea. Now if you are high horsepower and flogging the car at high speed, you arent going to use the lock up circuit anyways, and probably is better if you have control over it being on/off rather than allowing it to regulate itself.
But I may be wrong, and I am sure someone will have a better answer.

BTW, I may be wrong, but I do not think that all 200-4r have a lock up function.

Yeah, I'm not aware of any factory 200r4's that weren't equipped with TCC converter. I'd like to try one if I had a 3.21 rear but my 2.73 is too tall.