About a month ago I noticed that my car has a slight "hiccup" feeling at roughly 2600 RPM in 3rd gear. It's not something I've been able to reliably reproduce, but it does happen consistently between 2500-2800 RPM at partial throttle. It almost feels like wheelspin for a split second. The car's an automatic with less then 40k on the clock.
Has anyone else experienced this? Any idea what it could be? It doesn't seem to be getting worse or more frequent, but it definitely wasn't present when I got the car about a year ago.