2011 Edge with 12,500 miles. About 6-10 times during this peoird, both wife and I (driving solo) have noticed a slipping after acceleration out of a stopped position, or acceleration from a very slow roll, like through a yield sign. Feels almost like the tranny is in neutral then "settles" into first gear. Back to dealer twice, but of course, they can not duplicate the situation. Any ideas or suggestions would sure be appreciated.