Sorry if this is newbish, I tried to search it but probably was using wrong terms?

2006 4.4i, 48.5K miles. (1500 left on original warranty, CPO therefater). Lately when in crawling traffic, about 5mph or so, the transmission seems to hunt or lurch. Starting to get a little more pronounced and jerky. Is there some sort of software update or correct terminology I could express to my service advisor at the dealer? BTW, my service advisor is fantastic and will help w/anything, was just wondering if I can get some intel on what it may be before going in...

Thanks in advance.

Joe