air bubbles on trans dipstick

I have a 94 regal with 57000 miles on it and the transmission dipstick when hot has airbubbles on it.....it's not overfilled and shifts fine.

I have heard that the trans breather vent may be plugged.

Where is the location of this vent and how can I remove it to see if it's plugged.....does it screw in or pull out.

Thanks

More likely caused by an overfill or air entering the fluid stream, the seal on the oil filter is a common area for air to get into the fluid.