I was recently driving a friend’s car and noticed how easily it rolled when I let my foot off the accelerator. I drive a 2002 Hyundai Santa Fe V6 front wheel drive, and when I let my foot off the gas, the car immediately starts to decelerate. When driving down hill, or approaching a light, I sometimes shift into neutral and can coast with relatively low resistance. But as soon as I put the car back into drive, it seems to downshift suddenly. This is the only car I have ever owned and was resigned to the fact that maybe it was because I just drive a heavy car. But then I remembered a few years ago, I visited a different mechanic and whatever he did made the car seem to roll better, but now that feeling is gone.
Is there something on the engine, transmission or any other system that can be adjusted?