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Old 09-20-2016, 05:59 PM   #11
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Car for rural driving only. I don't often get stuck in bumper/bumper traffic for long periods of time. I dread it knowing I have to leave space between me and the car in front because ultimately, someone cuts in front and I'm back to square one.
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Old 09-20-2016, 06:04 PM   #12
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Quote:
Originally Posted by wavsine View Post
There's your answer. Creeping along in bumper to bumper traffic while going slightly uphill. This is not a planetary automatic. The clutches were slipping as they were constantly engaged/disengaged. Friction= heat.

Edit: I see sailor already answered. Do you drive in stop and go traffic often/daily?
^^^^^ This .....

Creeping the DCT is the worst torture than can be made...

Planetary ok to do it (people got the habit there)

DCT... don't!


It would be like always partially engaging / slipping the clutch on a 5sp in traffic (uphill even worse!!!) ... it will fade (overheat) & clutch won't last long under stress like this everyday.

I think the mistake by Ford / GeTRAG was to emulate the creeping feeling from the good ol' slushbox. They should just have made the car in neutral when no gas applied.
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Old 09-20-2016, 06:36 PM   #13
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^^^ excellent point.

DCT will go into neutral when in drive, but it only stays there at a stop with the brake firmly applied.
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Old 09-20-2016, 07:43 PM   #14
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Quote:
Originally Posted by ELCouz View Post
They should just have made the car in neutral when no gas applied.
Whenever I know for sure I will come to a stop I just coast in neutral and then sit in neutral. It just feels wrong to have it in Drive when you're just sitting there because it's a DCT and not torque converter. And I'd rather force it to be in neutral than let the computer figure it out.
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Old 09-20-2016, 10:09 PM   #15
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Quote:
Originally Posted by sailor View Post
Overheat warning for the trans. is based on recent use pattern, it doesn't have an actual temperature sensor.
Wouldn't the 6DCT250 in fact have a temperature sensor circuit as it calls out a specific temperature that triggers disengagement?

Warning Modes & Limp Home Mode

If the clutch temperature is found to be rising, warnings are generated to instruct the driver to halt the vehicle until the clutch cools down. The driver can also accelerate the vehicle to cool the clutch through airflow (clutches can overheat in stop-and-go traffic).

To help reduce clutch heating, the clutch will be engaged more quickly than normal, and engine torque reduced.

If the clutch temperature exceeds 300 degrees centigrade, the clutches are disengaged.

If one of the clutch actuator motors fails, then the transmission adapts to this by using only the gears on the other clutch.
If the speed sensors fail on the input shaft, then the gears on that shaft are blocked.

If the TCM itself or TR sensor (transmission range) fail, then both clutches are disengaged and the vehicle cannot be driven.
These failure modes will trigger the MIL/CEL (malfunction indicator light/check engine light).
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Old 09-20-2016, 10:23 PM   #16
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I've never seen info. on an actual sensor, many references on how they "infer" temperature from recent use history though.

First saw that in Getrag info. linked here on the design of the unit.
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Old 09-21-2016, 12:23 AM   #17
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Quote:
Originally Posted by sailor View Post
I've never seen info. on an actual sensor, many references on how they "infer" temperature from recent use history though.

First saw that in Getrag info. linked here on the design of the unit.
It has an ambient temperature sensor and being that it's mounted to the actual transmission its going to know. The heat put out (radiated) by the transmission will be picked up by the TCM.

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Old 09-21-2016, 12:40 AM   #18
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Here's a decent reference article, includes most of the info. seen in the Getrag articles I've seen:

https://www.google.com/url?sa=t&rct=...cJdiHvWZ44aLjA

Ambient (outdoor) temp from another sensor (already there for engine operation) is included in the algorithm for clutch temps.
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Old 09-21-2016, 12:54 AM   #19
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Quote:
Originally Posted by sailor View Post
Here's a decent reference article, includes most of the info. seen in the Getrag articles I've seen:

https://www.google.com/url?sa=t&rct=...cJdiHvWZ44aLjA

Ambient (outdoor) temp from another sensor (already there for engine operation) is included in the algorithm for clutch temps.
That's a pretty dumb thing to do. Smart in a way of warning the driver but dumb that there is no indication of a built in temperature probe. Seeing that these transmissions have no cooling system it would have sufficed to put a simple probe. So it's pretty much decided that if you get the message it may not actually be an overheat but would be safer to pull over or ease up on the transmission to prevent and serious damage?

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Old 09-21-2016, 05:52 PM   #20
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Quote:
Originally Posted by jehfmaticla View Post
First time poster, but I need some help...

So today I was driving to the Dodger game, in bumper to bumper traffic, going slightly uphill, when I got a notification that read "Transmission overheating" and it said to stop safely for 8 minutes. There was no place for me to safely stop.

Now, I know the DCT is faulty, and, in fact, my car often shudders and makes grinding noises, but this is something I've never experienced so far. I am extremely worried.

I drive a 2014 Ford Focus SE with about 33k miles.

Any help would be much appreciated.

Thanks!
Quote:
Originally Posted by jehfmaticla View Post
Thanks for the responses.

I've never owned a Ford before, and I won this car, so it's not by choice.

I knew immediatey from my first week with the car, the transmission seemed off, but Ford and everyone kept saying "it's normal", though I tend to believe otherwise.

So the fact that this happened is the last straw. But I don't know what to do. Lol!

My warranty is up in November, and I will have no peace of mind driving this vehicle after that point. Although, I heard they extended the warranty for the transmission, is this true?
Hi jehfmaticla,

If you decide to head to the dealer for the overheating, let me know. Send over a PM with your name, best contact information, VIN, and servicing dealer; I'll check into available options.

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