2010 Charger SRT8 Auto - (Intermitant - oh happy days) When unit is fully warmed up and left parked for about 10 -15 minutes, have a moderate to severe shudder (occasionally) when going from Park to Drive. Lasts momentarily to almost a second and cannot be repeated if attempted again after the first instance. Have had the latest trans update from Chrysler (Quick Learn from Oct. 2012) but no fix. Anybody else?