Trans flush = no,

But draining fluid, dropping pan, change filter, replace gasket and replace with new fluid will do no harm.

Its all about doing it the proper procedure, and you need to have diag software to check the temps etc, people make it sound alot harder then it is most of the time.

Its 250$ or so for fluid/pan gasket/filter vs 500+ at indy easily.

Depending on your skill level, you need some jackstands, sockets/ratchets/torx bits and inpa/dis.

I DIY everything from my car and 3 household, X is alot easier to work on in this case cause its a higher car, i did a trans drain/pan drop/filter on my older b5 a4, and you have alot leas room because of how low my car was (sport pkg),

It required almost basically the same procedure as the X including temp, being level, software etc, and i changed that out at 137k, they are known for auto trans issues as well (ZF trans) and the car shifted and ran like new after that.

Flush can get particles where they shouldnt be but alot of people here really need to stop bitching abt the liftime fluid cause its bullshit, draining your engine oil and refilling makes the car run better, why would this do otherwise for a trans? Same goes for engine, flush not recommended cause of dislodging things.

I already did my front + rear diffs 1 week after i bought it at 63k last year, but i will be doing transfer case and transmission sometime within next 2 months and will post a guide as well.

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2006 X5 4.8is Fully Loaded