Auto Transmission Oil Change-When to do it?

[fredo328]

I've been reading all kinds of stuff about not only when you should change the ATF to articles stating its a sealed system so no need to change. I have a 98 328 with 80,000 miles. Mostly highway driving, dont race but it has been shifting a little rough between second and third. Not enough that anyone in the car notices but I do-of course.
I can't believe that these things have life-time oil, so when do I change?

 

[Abdoman]

Independent BMW mechanics recommend 70-100k. BMW dealers don't tell you (it's lifetime fluid), but I had them change the fluid in my 7 and my 5 (when I had them) at 100k. It wasn't too expensive and I think it's well worth the $150 they charged me. Peace of mind and all that....

 

[fredo328]

Thanks Abdoman, you've validated what I've been thinking.