Transmission slip when accelerating at highway speeds?

Ever so often I get a big slip which I think is in the transmission when accelerating at moderate to highway speeds. It feels like the transmission makes the better part of a freewheeling revolution before grabbing somewhat violently. My wife can feel it from the passenger seat. I'd take it the dealer but it's so infrequent that I doubt they'd get it to do it.

 

Use your cell phone and video it - then take it to the dealer and show them - very doubtful the Dealer will do anything if they can't replicate it but maybe the video will help. GL.

 

It happens maybe every week or two so no way I could use a cell phone to record unless I record all the time. Plus it's happens in less than a second. I'll try to see if the dash cam picks up anything.

 

Unless you can find an exact pattern to be able show this issue to dealer tech during the test drive, they won't do anything...

 

Mine has done this randomly since I've had it, but no issues at 15k miles. I chalked it up to the turbos spooling than everything catching up.