I have had no real issues until recently. It jerked a couple times and acted like it was slipping or at least losing power like some of the other newer cars have. It only did it a couple times and mostly runs fine. I have 140K miles on it and read that you shouldn't touch it with that many miles. But with the issue and the fact that the fluid is black(level is OK) do I go ahead and do it? I would do it myself. And if I do what fluid should I use? I hear the Mercon LV is recommended but doesn't last.