I have found this amazing article about the transmission in BMW E90’s so I’m re-posting it here in my blog with updated pictures and part numbers to match ZF 6HP21.
Perhaps best to change atf every 30,000km and change seals at 60,000km.
The same requirement applies also to all BMW gearboxes as far as I am concern including my GM gearbox.
I ageee with these
See links a great article for us all to take note. And I had changed the gearbox seals at 60,000km and the shift quality improved.
https://www.google.com.sg/amp/s/say...ut-your-zf-automatic-transmission-issues/amp/
Perhaps best to change atf every 30,000km and change seals at 60,000km.
The same requirement applies also to all BMW gearboxes as far as I am concern including my GM gearbox.
I ageee with these
See links a great article for us all to take note. And I had changed the gearbox seals at 60,000km and the shift quality improved.
https://www.google.com.sg/amp/s/say...ut-your-zf-automatic-transmission-issues/amp/
