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      09-30-2023, 05:11 PM   #1
The-Traveler
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I did preventative maintenance by changing fluid at 150,000km and now I have slipping when hot and high torque/low-rpm. Second fluid service, first was done at half mileage by warranty but without changing filters. This time I took out the gross filters.

I do track the car, and I used to run gts tune ages ago. I did full recalibration in ISTA and paid dealer to inspect everything.

Currently Iím running fluid dealership sells. No issues at high rpm and no issues until engine hot.

Thanks!
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      10-03-2023, 03:47 AM   #2
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Quote:
Originally Posted by The-Traveler View Post
I did preventative maintenance by changing fluid at 150,000km and now I have slipping when hot and high torque/low-rpm. Second fluid service, first was done at half mileage by warranty but without changing filters. This time I took out the gross filters.

I do track the car, and I used to run gts tune ages ago. I did full recalibration in ISTA and paid dealer to inspect everything.

Currently Iím running fluid dealership sells. No issues at high rpm and no issues until engine hot.

Thanks!

Sounds like the clutch packs need replacing.
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      12-03-2023, 11:15 AM   #3
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Did you only start to notice the issue after the fluid was changed? If so, are you certain the BMW procedure was followed to ensure all of the needed fluid was added? It is easy to miss as it is not intuitive. Even YouTube pros not familiar with BMW miss it as seen in this recent Speed Academy video here.

Check out this thread here for the fluid topping off procedure if you aren't familiar with it.
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      12-03-2023, 12:49 PM   #4
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ISTA calibration would usually fail if there was a hardware issue.
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      12-03-2023, 06:25 PM   #5
The-Traveler
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Thanks guys, yes it started on refill even though I insisted the Indy shop do the ista procedure while filling. But I think they didnít do it properly as I was watching it and they didnít know what they were doing. I ended up paying BMW a lot of money to top up the fluid and do the procedure, they said clutches are toast. Then I kept driving and now the issue is gone. Honestly I think good help is hard to find with these DCTs.
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      12-03-2023, 07:34 PM   #6
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Quote:
Originally Posted by The-Traveler View Post
Thanks guys, yes it started on refill even though I insisted the Indy shop do the ista procedure while filling. But I think they didnít do it properly as I was watching it and they didnít know what they were doing. I ended up paying BMW a lot of money to top up the fluid and do the procedure, they said clutches are toast. Then I kept driving and now the issue is gone. Honestly I think good help is hard to find with these DCTs.
I really hope your DCT gearbox got the original DCT Pentosin => https://www.bimmerworld.com/Fluids/D...220440214.html
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      12-03-2023, 11:42 PM   #7
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Glad to hear it was the cheapest fix.
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