I know there is tons of information on here about people doing their own drain and fill. Since the dealership wasn't charging me as much as I thought, I went ahead and let them do it. At about 70,000 miles the service advisor told me she saw the fluid and it was very black and it was a good call to remove the fluid. The only thing that concerns me is after examining the paper work, I saw they did a machined flush as opposed to just draining and exchanging fluid like many on here have done. What's you guys view on this? It was done using one of those BG machines in which you also add a cleaning agent. No mention of the Ian being dropped and new filter being put inside. Was this the way to go? I mean it has completely new fluid in it, I just know some say it can do more harm than good to machine flush especially if the fluid was as dark as mine. I guess it can push contamination and debris around causing more clogging of filter. On the other hand just draining it doesn't clean the torque converter very well. How many of you have had this done, and how well did it help the life of the tranny?