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Old 05-10-2025, 03:10 AM
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Quote:
Originally Posted by wpoll View Post
Sounds about right. My two recent drain and fills were about 4.5l (a bit over 4.5qts) but in both drain I left it overnight (drain while hot - leave overnight to get cold before fill and then warm to correct temp to set level).

Two drain fill cycles will replace about 75% of the fluid.

Sadly, I now have a trans problem... it has developed a 5th slam at low loads (around 1500rpm or so) - this seems to be a direct result of the drain and fill.

Thinking about options - most likley is a mechatronic "rebuild" such as you are doing.
Yep, that's right - now looking into 3 fill cycles after consulting ChatGPT. As for your issue, checkout these videos by Gary Ferraro, whose considered a guru of the ZF transmissions. You can actually ping him with your issue and he may offer recommendations. Any trans code thrown?

www.youtube.com/watch?v=W7DZbrvrI5k&t=1073s
www.youtube.com/watch?v=Ct8qbmDXqjs
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