I have an x5, 3.0 , 2001 auto: 185K miles. Drives very nice and still gets 23mpg at 75 on the highway. After a recent software update and ECU re program they still were not able to increase the idle to 750 rpm. The low idle sometimes less than 500 is the cause of this constant funky vibration. Oh well, it's an old bimmer. So, I want to go ahead and do some fluid updates. Last auto trans fluid and filter change was around 120K. I can't remember what we used for fluid. We drained it completely. I also want to change out the front and rear diff fluids and the transfer case fluids. What are the diff weight rates ? Synthetic? Trans axle fluid weight? I need this x to last a few more years. I was told it is in exceptional well cared condition by a very knowledgeable mechanic in Conyers,Ga. He found the initial front end bounce and vibration to be from:... flat spots in the tires. Three prior mechanics suggested other fixes that didn't fix the problem. Oh well.
thanks J

__________________
X5 3.0 AUTO -2001 - 238,000 miles