Acura legend

My acura legend is now starting to not shift in d4 or d3 after it has been driven for awhile… It only shifts to 2 and 1… So I drive it in 2 but it doesn’t sound right or drive right I can definitely tell the difference… What is going on what should I do???

What year is your Legend? How many miles on the car? What’s the maintenance history of the transmission? Have you checked the transmission fluid level? Have you consulted a mechanic about this?