OK I did transmission fluid flush on my 02 4.4i

[HPIA4v2]

Originally Posted by Multibeemer

Thanks for the great write-up. It doesn't look as bad as I had heard. A couple of questions, the first of which is really dumb - what's the easiest way to find out what type of transmission you have, and exactly what type of fluid it needs (mine's an '03 4.4i)? And second, to drain the fluid out of the converter, is it just a matter of repeating the procedure a few times (minus the removal of the pan) to get most of it out? Thanks.

You may want to call bavauto.com to see which trans fluid goes with 03 4.4i (my guess will be the same as my 02 4.4i).
Also see if they can ship to Canada for oother poster.

You can't drain the TC and the full capacity is about 9 quart so after dropping the pan, you still have old 3.5 quart of old fluid in TC. My logic is that old fluid is more cleaner since the metal shaving is trapped in filter or magnet down in the pan. I plan on doing it again in a year when mine is @75Kmiles (it is at 64kmiles right now).

[Multibeemer]

Originally Posted by HPIA4v2

I plan on doing it again in a year when mine is @75Kmiles (it is at 64kmiles right now).

Thanks, but I'm not clear on why you plan to wait a year before doing another partial drain/refill. Why not just repeat the drain and refill procedure onceor twice to get most of the old fluid out in one go-around?

[HPIA4v2]

Originally Posted by Multibeemer

Thanks, but I'm not clear on why you plan to wait a year before doing another partial drain/refill. Why not just repeat the drain and refill procedure onceor twice to get most of the old fluid out in one go-around?

No scientific reason, just kinda follow Mike Miller suggestion long time ago at Roundel (BMWCCA magazine tech editor) to do flush every 30kmiles.