Engine is revving when turning

Hi, I have a 2001 chevy cavalier 117000 miles/automatic. My problem is when I go to make a left turn from a starting at a stopped position, my car will sometimes start revving high halfway through the turn as if it was in the neutral position and then it will catch the gear I guess? And I will be able to move again. This only happens when I make a left turn and it only seems to do it when the transmission is switching gears. If I were driving stick, it almost seems like I would be making a left and halfway through the turn I would press down on the clutch pedal, give it also of gas and then release the clutch. Sometimes it happens so I hard I get some wheel spin out of it. My guess was maybe something with the transmission, maybe the differential considering it is on that side? Please help!