ATX Magical 2-stage OD switch or Tune with Sport Mode - Focus Fanatics
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Old 04-11-2014, 03:17 PM   #1
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ATX Magical 2-stage OD switch or Tune with Sport Mode

There were two different threads recently, both discussing similar subjects. Those threads talked about ATX OverDrive and TC lockup; those threads are here->

3rd gear or overdrive issue?
http://www.focusfanatics.com/forum/showthread.php?t=400658

Auto trans in a 2003 Focus w/ZETEC
http://www.focusfanatics.com/forum/showthread.php?t=394674

I found comments made by my_beautious_ZX3 to be especially helpful to better understand how & when OD and TC lockup function. I was about to post in the most recent thread, but I decided my questions would be a high-jack of the OP, so decided to start a new thread.

The quote below was cut in order to focus on a single item.
Quote:
Originally Posted by my_beautious_ZX3 View Post
It's too bad Ford bundled 4th gear & TC lockup on the same OD switch; I'd prefer a 2-stage OD switch that allowed me to enable 4th gear but disable TC lockup.
I had never thought about having individual control of OD and TC Lock. I enjoyed imagining what that would be like, and how it could benefit performance. This imagination got me thinking about a car performance problem I have been experiencing, or was experiencing much more last year in the heat of the summer. Problem -or- No problem-> the situation is our ATX cars can get in 4th gear at low speeds with TC locking, and the car will bog down some because of a lack of torque-> and this is just part of ownership of a ATX 4-banger. Despite my desire to discuss the engine performance problem I was having, I want to instead ask about custom PCM tunes –and- the quote above. I realize the world of tunes for the ATX is small, but here we go anyway…

Has anyone in the world of tuning a Focus ever created something like a 2-stage OD switch that would allow 4th gear but disable the TC lockup? Seems like this kind of 2-stage switch would require a custom tune and physically adding a new switch huh?

If adding a “2-stage OD switch” is a little too far-fetched, here is my other question;

If using a custom tune, could I push a button and switch from normal performance to “sport mode”? Sport mode would do something like-> stay in 3rd gear a little longer than usual and not engage TC lockup until VSS was greater than (?) 55mph.

Jokes about buying a MTX car are expected and welcomed.


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Old 04-11-2014, 05:50 PM   #2
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a custom tune is a good idea; I didn't think of that.

But, my reason for wanting a 2-position OD switch is boring & practical: alot of the roads in my area are 35 - 45 mph, so depending on traffic, I'll be driving along, hovering around 40mph, and the TC will lock...and then traffic will slow and it will unlock...and then traffic will speed-up and it will lock...and then the road will dip slightly and the vehicle will coast causing the TC to unlock...etc etc.

Maybe I should try replacing the OD switch with a dimmer switch, and then I could fine-tune my shifts.
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Old 04-11-2014, 07:30 PM   #3
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I hope that last part was a joke
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Old 04-11-2014, 10:39 PM   #4
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Yeah to fine tune it would need to be a intermittent wiper switch that clicked into position.
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Old 04-11-2014, 11:39 PM   #5
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Torque converter locking could be mechanical, and OD switch just controls fourth - don't know the details of this trans. myself.
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Old 04-12-2014, 02:27 AM   #6
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Electronic trans and converter control. So a custom tune would be best.

There's this option in the SCT software and IIRC the PCM is pinned for it (no wire though) called an 'Octane Switch'. I'm not really sure if it's something the car actually supports or just a name-place-holder.
I know the older Ford PCM's (EEC-IV) had that option, but the newer (EEC-V) I'm not sure.
But if it does/can work, maybe something could be modified through that to lock/unlock the converter. And then use the O/D button as normal. It'd be a bit of trial and error to get it working properly and making sure the Octane switch doesn't alter other things in the tune.
You'd have to talk to Tom and see if he'd want to spend that much time trying.
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Old 04-12-2014, 09:43 AM   #7
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I just looked in a 2011 ECU code and the converter lock for 4th is 100% controllable by both MPH and TPS , I know I can control the shift by TPS and MPH so both those together , would that help what your talking about ?

Tom
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Old 04-12-2014, 09:51 AM   #8
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4th gear is od but lockup is its own thing for example 3rd gear normally does not lock up converter but when od is cancelled lockup is enabled in 3rd gear
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Old 04-12-2014, 10:01 AM   #9
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Quote:
Originally Posted by puffingonj View Post
Yeah to fine tune it would need to be a intermittent wiper switch that clicked into position.
maybe, but then you would be f'd if it started raining.

regardless, my method is the easiest way to convert the 4F27E into a CVT.
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Old 04-12-2014, 10:02 AM   #10
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Lmao
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