2000 Altima tranny problem

[ktmracer]

hello

i have a 2000 nissan altima 2.4L 4 cyl with 178000 miles on it this car has always been maintained and reliable. Recently the car started finding a neutral zone when it sits stoped in D for more than a minute or two, when i go to move and hit the gas the engine revs slightly and then ever so gingerly drops back into 1st and drives completley fine other than this hesitation. Also at stop signs its fine when i only stop for a second but waiting in line at dunkin or stuck in traffic on highway uphills this gets really annoying. I am waiting for it to not move at all. Tranny fluid and filter changed at 165000
and again at 175,000 when problem started and was full and smells like tranny fluid. I would love to drive this car past 200000 any suggestions would be greatly appreciated.