Ecoboost Performance Forum

Ecoboost Performance => Troubleshooting, Maintenance, TSB Articles => Troubleshooting => Topic started by: MDesign Performance on November 10, 2014, 02:29:06 PM

Title: Transmission Sensor
Post by: MDesign Performance on November 10, 2014, 02:29:06 PM
I remember hearing someone having issues with their transmission and the dealer swapped a sensor on the transmission, anyone know what sensor this is and where it is? I got a random transmission slip on the 2-3 shift right after returning to stock, Im hoping that's the reason why but just want to check the sensor.
Title: Re: Transmission Sensor
Post by: SHOdded on November 10, 2014, 02:40:18 PM
That would likely be the TSS/OSS sensor combo.  Someone with a shop manual can maybe put up a diagram of exactly where it is?
Title: Re: Transmission Sensor
Post by: mval on November 10, 2014, 03:47:15 PM
spartn27:
manu is all over it. i had the situation it got so bad was doing it multiple times a day. had to take a dealer tech with me to prove it & even with his laptop hooked to obd when it happened didn't throw a code. the interesting thing was their first attempts was to do tsb software updates. luckily it made issue so bad i could make it happen when tech rode with me. mine was worst  rounding a curb & then picking up speed. no issues since replaced sensors although haven't driven it a lot.
Title: Re: Transmission Sensor
Post by: crash712us on November 10, 2014, 04:08:52 PM
You say right after returning stock. If that is so I wouldn't worry about. Strange behaviors are normal when ECM has been reset. Drive it and monitor give the ECM some time to relearn.


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Title: Re: Transmission Sensor
Post by: MDesign Performance on November 10, 2014, 04:44:44 PM
A couple times Ive had the car refuse to shift when I was dogging on it and there was a good amount of wheel spin. It would literally just stop shifting and get stuck in gear until I reset the car which would cure everything, no codes or nothing, I just chalked it up to the fact that the car is a electric beast of a nature due to all the electronics and is tuned so slight hiccups are ok.
Title: Re: Transmission Sensor
Post by: mval on November 10, 2014, 05:50:36 PM
mine at first was a slight hiccup, like larry's from NY is doing, but when they ran the TSB, it became a once now & then to multiple times a day & i could pretty well make it happen & became a real issue. it was bad enough that if i wanted to sell or trade it i couldn't have. made worst by it acting up on my way mexico to show my mopar friend the good that the DP's had done to low end torque.
Title: Re: Transmission Sensor
Post by: MDesign Performance on November 10, 2014, 09:59:53 PM
That sounds like what occurs when the TSB is done incorrectly, I was reading it today and it stated exactly that symptoms will get worse and more frequent. Might want to show them that.

As for my problem, it's getting slightly better I put about 40 miles since flashing. I went ahead and picked this up anyway as preventative maintenance.

(http://i61.tinypic.com/b6927c.jpg)
Title: Re: Transmission Sensor
Post by: SHOdded on November 10, 2014, 11:52:51 PM
Let us know how the Lucas product works out for you.  wasinger loves 'em :D
Title: Re: Transmission Sensor
Post by: MDesign Performance on November 10, 2014, 11:54:36 PM
I just tossed it in there so it can blend overnight, hopefully tomorrow I'll have something to report back on though it might take a couple hundred miles I've read.
Title: Re: Transmission Sensor
Post by: wasinger3000 on November 11, 2014, 11:10:33 AM
Quote from: SHOdded on November 10, 2014, 11:52:51 PM
Let us know how the Lucas product works out for you.  wasinger loves 'em :D
Hey now... lol. love is a strong word. I'd say I like some of their products. I'm kinda jumping ship on all brands right now. Seeing if the grass is greener so to speak.
Title: Re: Transmission Sensor
Post by: MDesign Performance on November 11, 2014, 11:12:06 AM
Well it improved the transmission about 30-40% I'd say, though there still seems to be something not right. I think I might have a boost leak since I was only peaking at 13.63psi apposed to before where I swore I saw 15 on the X4, maybe that might have some relevance to the 2-3 shift flare.

Another idea might be that it needs the TSB done that involves removing a check valve in the transmission, not sure it has been done.

I also will be swapping my PTU fluid again so hopefully this time I can get more fluid in there and see if that has any affect.
Title: Re: Transmission Sensor
Post by: SHOnUup on November 11, 2014, 11:13:58 AM
When I had a boost leak I was getting boost readings in the mid 15's to a low 16. Since I fixed the leak I haven't recorded boost over a 12.8

Rich

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