New 2004 Camry XLE. Great car, <500 miles so far, but I seem to detect that the drive is not smooth, especially at lower speeds. It's as if the car is fighting the engine (or computer), and the RPM drops slightly and then returns. Hard to describe, maybe I'm just not used to something. Does this sound like a computer or other problem that I need to have looked at, or will it go away or I just get used to it?