[Bigrich45]

I have a 2008 328xi with 170,000 miles, it's starting to slip and shake a bit in lower gears. BMW says to never change the transmission fluid, but my local shop says I need it. Do you think a transmission oil change will help the slipping?

[Emilime75]

Not likely...and, as to the "lifetime" fluid, that's total BS. No fluid is good forever. What that basically means to BMW is that it's good for the 5 or so years that the car is covered under warranty, and then you trade it in for a new one, so it's good for the lifetime of original ownership.

[Street of Rage]

at 170xxx miles, you better spend extra for the fluid to perform a drain and flush to get most of the old BLACK fluid out, don't forget the transfer case since yours is a xi

I did mine (RWD) at ~87k along with new filter pan, and the fluid was already dark as hell. I'm not trusting the LIFE TIME label.

From what I read, every ~40-45k for drain & fill, and filter pan every other drain & fill.

[autoart]

Do not flush. 1st just drain and change filter/pan

[Street of Rage]

By flush, I mean, let the transmission run for awhile then drain and fill again. Since at 170XXX miles, I'm sure it gets super nasty...

[hOlykamOtie*]

I just did mine last weekend. Bought the transmission kit plus the sleeve/adapter at FCPEuro. I did a drain and fill on my E90 330i with 170xxx miles

Just be prepared as it will be super messy once you drain and dropped the pan/mechatronic body.

[Bigrich45]

Originally Posted by hOlykamOtie*

I just did mine last weekend. Bought the transmission kit plus the sleeve/adapter at FCPEuro. I did a drain and fill on my E90 330i with 170xxx miles

Just be prepared as it will be super messy once you drain and dropped the pan/mechatronic body.

I just got it done at my local shop that specializes in BMW's, they also put in this special lubricant. Cost was 700 freaking Dollars. Insane, I thought it would be around 150-200. Wish I would of just done it myself, but i will tell you it's driving like the day I bought it back in 08