2009 KIA OPTIMA Power Trainautomatic Transmission Problems

WHEN DRIVING CAR IS OK, BUT WHEN YOU SLOW DOWN TO AROUND 20 MPH THE CAR JERKS , BUT AFTER CAR I DRIVEN FOR AROUND 10-15 MILES IT DOESN'T DO IT. *KB

I HAVE A 2009 KIA OPTIMA LX WHEN I GO TO BRAKE AROUND 20 MPH IT FEELS LIKE THE CAR IS DOWNSHIFTING HARD CAUSING ME TO JERK IN THE SEAT. IT DOES THIS ALL THE TIME I DO FEEL THIS IS THE TRANSMISSION AND I AM TAKING IT TO THE DEALER TO BE SERVICED. *TR

2009 KIA OPTIMA LX/EX SEDAN 4 DOOR TRANSMISSION 15,000 MILES EXTREME HARD DOWN SHIFT WHEN SLOWING TO A STOP FROM SECOND TO FIRST., ALMOST LIKE IT THROWS THE CAR INTO PARK, ENOUGH THAT IT COULD THROW YOU INTO WINDSHIELD IF NOT WEARING A SEATBELT. THE DEALER CAN NOT FIND THE PROBLEM, IT ONLY HAPPENS 20% OF THE TIME ON ICE AND SLICK ROADS IT CAN CAUSE YOU TO LOSE CONTROL OF THE VEHICLE. THIS HAS HAPPENED TO ME SEVERAL TIMES. *TR

BOUGHT A KIA OPTIMA A FEW MONTHS AGO AND RECENTLY IT HAS DEVELOPED A DANGEROUS SHIFTING PATTERN WHEN DOWN SHIFTING FROM 2ND TO 1ST ABOUT 20MPH IT JERKS THE !@#$%'.OUT OF YOU AND IF YOU HAPPEN TO BE BRAKING AT THE TIME YOU MEET A SNAP FROM SEAT BELT AS YOU FLY TOWARDS WINDSHIELD CAUSING SEVER NECK AND BACK PAIN THIS IS GETTING WORSE , DEALER WILLING TO FIX BUT KIA IS IGNORING THE ISSUE AS I HAVE HEARD OF OTHERS HAVING SAME PROBLEM , I HAVE BEEN TOLD BY DEALER ITS PROBABLY JUST COMPUTER ORIENTED BUT KIA HAS TO AUTHORIZE THE REPAIR , CONTACTED KIA AND AS EXPECTED THERE COMPUTER WAS DOWN AND THEY COULD NOT HELP ME! *TR