Is this pause related to when the transmission is changing gear?
I seem to remember reading a while back that a pause when changing gear was a symptom of potentially more serious problems with the box.
I don't remember all the details, but low transmission fluid, the torque converter and clutches were mentioned as possible causes of the brief pauses.
I'm not saying that is what your problem, but I would definitely say you should always get transmission problems check at the earliest opportunity. If they go baddly wrong, you might have to spend a fortune getting it fixed.
Antara SE Nav 184 AWD Auto. Silver/Black