early morning automatic transmission problems on 2001 Hyundai Sonata

before the car has warmed up it has just started taking its time to shift gears. Seems to be fine after about 20 minutes of driving. Fluid was changed about 10,000 miles ago

Asked by for the 2001 Hyundai Sonata
A visit to a transmission shop for a diagnosis may be the answer. Be prepared to leave the car overnight so they can drive the car on a cold engine/tranny to get a feel for the problems.