Transmission not feeling like it went into gear all the way.

I was idling in a parking lot for a little bit and when I
wanted to leave I had to give it about 2,000rpms to
get it to move. I went down the road and put it in
park and back to drive and it was fine after. I saw
in the manual that's its due for it first transmission
service to adjust the bands and stuff. Wanting to
know if thats all it needs or if it that problem is
telling me something is wrong. No transmission
codes.