hi folks, new here. just bought my first x sat and must say its very different from the lowered, modded 3 series i am used to but i am loving it. had a couple questions though, i have already ordered trans fluid and filter as well as t-case fluid as it is almost at 100k. i was curious though does anyone offer trans tuning for them like they do for the e39's? or has anyone run an aftermarket valve body to help the trans last longer? I have experience in diesel truck using a good vb and tc to make a stock trans handle way more than it ever should. Also my x has navigation but has the 2001 disc in it. Can i still get updated discs? or does it also need a software update or am i just out of luck? Where i live the old disc is worthless lol. thanks for helping a newb!!