I own a 98 Odyssey with automatic transmission. Off late I notice that the very first time I start my van in the morning, the gears don't engage/change immediately, but engage after a slight delay and a sudden surge. After couple of gear changes the behaviour is normal. Evenings when I drive the van back from work I don't experience any surges like this. I changed the transmission fluid/filter flush, but status quo. Anyone has any insight into what could be happening?