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      07-24-2021, 03:42 AM   #1
Michell
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F80 M4 DCT Tranmission Temperature

Hi,

Anyone experience this driving show traffics stop and go?
If I push hard the car is ok even using LC.

https://youtu.be/wGqnYe_RRKY
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      07-24-2021, 07:25 AM   #2
An20Olives
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I found it best in slow traffic to avoid creeping forward when stuck at a light or heavy traffic when others creep forward. Using the low speed assist helps but you're still slipping and heating up the clutches in stop and go.
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      07-24-2021, 12:00 PM   #3
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Quote:
Originally Posted by An20Olives View Post
I found it best in slow traffic to avoid creeping forward when stuck at a light or heavy traffic when others creep forward. Using the low speed assist helps but you're still slipping and heating up the clutches in stop and go.
Yes but the temperature only go high wen the car is stopped.
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      07-24-2021, 03:35 PM   #4
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Have you changed your DCT fluid ever? If not, I would get that service done to see if it helps. For cars you plan to keep, do it every 50k miles.
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      07-24-2021, 04:07 PM   #5
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Quote:
Originally Posted by hellokitty View Post
Have you changed your DCT fluid ever? If not, I would get that service done to see if it helps. For cars you plan to keep, do it every 50k miles.
Im waiting for the kit. But I dont think thats the problem. Looks like lubrications in low rpm.
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      07-26-2021, 07:30 AM   #6
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I made another test with the engine off more than 12 hours. And the sensor is showing higher values than normal.

I made a video:



I think is the temperature clutch sensor. But I don’t know what is that sensor.
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      07-26-2021, 07:52 AM   #7
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Hi,

It seems to be NR 14 on this picture, RPM & temperature sensor:
https://www.realoem.com/bmw/enUS/sho...diagId=28_0020

RPM and temperature sensor, part # 28107842851
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      09-03-2021, 06:10 AM   #8
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Fixed!!!
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      09-05-2021, 11:59 AM   #9
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Quote:
Originally Posted by Michell View Post
Fixed!!!
Hi there, I am having the same problem too. Has replacing the temp sensor part really fixed the problem for good? Please let me know! Thank you!
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      09-05-2021, 12:07 PM   #10
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You need to check width the ISTA+ like me. If the sensor is showing in the morning values different from ambient temperature
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      09-09-2021, 05:54 PM   #11
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Quote:
Originally Posted by Michell View Post
Hi,

It seems to be NR 14 on this picture, RPM & temperature sensor:
https://www.realoem.com/bmw/enUS/sho...diagId=28_0020

RPM and temperature sensor, part # 28107842851
Is this sensor inside or outside of the transmission?
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      09-09-2021, 05:58 PM   #12
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Quote:
Originally Posted by F83Guarantee View Post
Is this sensor inside or outside of the transmission?
Inside
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      09-15-2021, 02:26 PM   #13
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Quote:
Originally Posted by Michell View Post
Inside
Gracias brother!
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      09-17-2021, 03:07 AM   #14
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Quote:
Originally Posted by hellokitty View Post
Have you changed your DCT fluid ever? If not, I would get that service done to see if it helps. For cars you plan to keep, do it every 50k miles.
All fluid analysis for the DCT fluid points to it being an item that can easily last 80,90 even 100k+ miles before it needs to be serviced. I know someone who beat on their F80 at the track, w/ GTS transmission tune, who had everything well within normal averages when his DCT fluid was changed at 110k miles
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