Transmission problem! I need everyones help!

[IzzE53]

Ok I have a 2005 4.4i with 45xxx, when I come to a rolling stop, I give it gas and BAM like a huge jerk and it feel like I got hit from behind! This does not happen all the time. I have taken it to the dealer, and they updated the tranny software, and deleted the adaptation values(learning codes for your driving style). They told me they can not replicate this problem, and that they need to see it happen for them to take care of it. What I need to know if anyone has had this happen to them? My warranty is about to run out and I need to find a solution. Please help!