Tech Pack Transmission Data Point

[GT_Dave]

One of you guys needs to wrap the sensor and connector in insulating tape and see what happens. If it is like the rear axle sensor it actually does not make contact with the fluid so case temperature is what it reads. I'd like to see someone put a mechanical gauge in the drain plug hole to compare numbers. A re-flash could make these problems go away if they just adjust parameters. I honestly don't think it reads accurate tempertures.

I don't agree, the reading from the factory sensor is damn close for the application since the heat is generated from the inside of the transmission. I have a temperature gauge sensor mounted in the middle of the transmission on the opposite side the factory sensor is installed. The separate temperature gauge reads within 3 degrees of the factory sensor up to 180 degrees. As the transmission gets hotter the factory sensor reads slightly hotter by about 6 degrees at 235.

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[superman07]

"Track pack" - doesn't get any clearer than that. I never asked for an explanation just saying what anyone who has tracked a car before is thinking about the constant whining. The fact is, a gt350 even without coolers is still a better track car than a 2000 Cobra R or an 05-06 Ford GT.

:ford:

 

[Optimum Performance]

I don't agree, the reading from the factory sensor is damn close for the application since the heat is generated from the inside of the transmission. I have a temperature gauge sensor mounted in the middle of the transmission on the opposite side the factory sensor is installed. The separate temperature gauge reads within 3 degrees of the factory sensor up to 180 degrees. As the transmission gets hotter the factory sensor reads slightly hotter by about 6 degrees at 235.

Do you have any pictures of your set-up? Are you measuring wet temps or case temp? Do you know if the factory sensor is a wet sensor or like the rear axle? How have you eliminated sensor body temperature error from it being right above the exhaust?

 

[montreal ponies]

I wasn't babying the car, but I wanted to see if I could get it to go into limp mode on the street. It helps having the transmission temperature readout available. I could see the temperature just continue to rise and rise and it kept going up until I started cruising at ~2,000 rpm for a while. I'm going to go back to the dealer and this time they won't be able to tell me that it doesn't count because I was at a track. This time I was on the street. Whether that will matter or not I have no idea, but in my opinion if you can get the car to hit limp on the street there's a problem.

Totally agree with you , a car or any car for that matter shouldn't be goint into limp mode when driven on the street. Especially this car that Ford sold us as the most track capable car ever.

Here's hoping they don't give you the run around we're used to hear.

Good luck and keep us in the loop as to what they say.

 

[Dary]

One of you guys should print out all the threads regarding the limp mode issue (in B&W; somehow it'd look more serious), slap a cover page on it with a few well written legal phrases then mail it to Ford HQ.

If you ask a lawyer to mail that for you, it'd be even better.

 

[Tank]

Do you have any pictures of your set-up? Are you measuring wet temps or case temp? Do you know if the factory sensor is a wet sensor or like the rear axle? How have you eliminated sensor body temperature error from it being right above the exhaust?

So you're saying we can't trust the factory installed sensor? That's a clusterfuck...

 

[GT_Dave]

Do you have any pictures of your set-up? Are you measuring wet temps or case temp? Do you know if the factory sensor is a wet sensor or like the rear axle? How have you eliminated sensor body temperature error from it being right above the exhaust?

In my professional opinion (every day I work with heated tooling in the 300 - 400 degree range for injection molding) the temperature sensor in the transmission is about as accurate as you will able to implement. We use similar sensors on our tooling and I know how accurate the variances are for different installations. Since the ATF fluid would be heating the case, and the aluminum case has an excellent heat transmitting factor, the pocket for the sensor is in a safe and logical configuration. Sensing the case temperature and sensing the oil temperature won't show a significant difference in such a dynamic application. I don't think the exhaust pipe is close enough to have any noticeable effect on the readings. The sensor I added is mounted much closer to the catalytic converter, if that CC was a factor I would be seeing higher temperatures on my installed gauge. From what I can tell by the data that I collected, the transmission shouldn't vary in temperature more than 10 degrees from the front to the rear of the case.
The bottom line is, I trust that the factory sensor is sending accurate information.

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