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DCT fluid change

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Mbintx
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DCT fluid change

Post by Mbintx » Tue Aug 09, 2022 3:19 pm

I’ve gotten some input and read lots of posts about the fluid change in a DCT.
My question is, can the fluid be changed and do a complete job without the use of the ISTA software?

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B21
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DCT fluid change

Post by B21 » Tue Aug 09, 2022 4:47 pm

Mbintx wrote: Tue Aug 09, 2022 3:19 pm I’ve gotten some input and read lots of posts about the fluid change in a DCT.
My question is, can the fluid be changed and do a complete job without the use of the ISTA software?
Not easily…
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

Mbintx
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DCT fluid change

Post by Mbintx » Tue Aug 09, 2022 8:33 pm

B21…I’ve seen a few videos online and I know I’d have no problem doing it. I just don’t have a laptop to use the software. That’s why I was curious if it can be done with out it

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B21
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DCT fluid change

Post by B21 » Tue Aug 09, 2022 9:48 pm

The issue is that you have to purge the system, unlike the ZF6 or 8HP it’s not just a question of shifting a few gears…

My trusted Indy tried to do it without the correct s/w and I subsequently got my one and only transmission overheat warning…

Took it to a BMW Indy and they added another litre of fluid with the correct s/w
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

Mbintx
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DCT fluid change

Post by Mbintx » Tue Aug 09, 2022 9:56 pm

Ok. I know you told me that before but I thought maybe it was possible. I’ve contacted an independent garage in Dallas to get a quote on getting it done

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