FYI Some good Transmission tips

[HPIA4v2]

Originally Posted by PersonaNonGrata

Thanks for passing on the advice!

The problem is, though, BMW specifies a lifetime fill of transmission fluid and the debates go on and on about the efficacy of changing the transmission fluid in our E53s. I wonder what your friend would say about the situation we face and whether he has any experience with E53s?

To me, looking at all fluids colors from the dirtiest/nastiest compare to virgin fluids (I did all these fluids at least twice so this is not based on lab tests but just looking at color)
1) trans fluid
2) PS
3) xfer case
4) brake
5) diff
6) coolant

I am not arguing you should change the trans but if you do the last 5 and think the first one is a waste, I need to hear some good reasoning.