My USA Elantra 2010 Its mileage 41000 It has a problem with the autotransmission that when I turn from P to R there is some delay for a seconds in response, and the another problem during drive on D when foot lifting from accelerator then reaccelerate , motor sound run high just like it is on N for a while then it return to normal. When I visit the local mechanic, he told me that he want to replace the transmission fluid and opening the internal transmission control for cleaning, and he did. After that my car becomes worse. Some others told me that my car needs reprograming!! Note: my Elantra is USA car, and I am in Iraq and there is no official service workshop near. Help please. Yours RAYAN.