NHTSA Complaint #11046176 — 2016 FIAT 500X

MY AUTOMATIC TRANSMISSION DOES NOT SHIFT PROPERLY. THERE ARE CONSTANT DELAYS IN SHIFTING. UPON ANY ACCELERATION, MY VEHICLE WILL FAIL TO SHIFT FOR UP TO SEVERAL MINUTES. DURING THAT TIME THE ENGINE WILL REV UP TO 600 RPMS BEFORE FINALLY SHIFTING. THIS HAPPENS EVERY TIME I ACCELERATE QUICKLY WITH EVERY GEAR. ABSOLUTELY IMPOSSIBLE TO PASS OTHER CARS OR SPEED UP QUICKLY. ALL SHIFTING IS CLUNKY AND VEHICLE OFTEN SUDDENLY DOWNSHIFTS WHILE DRIVING ON AN OPEN HIGHWAY AND MAINTAINING A SPEED OF 55MPH TO 60MPH. ALSO DOWNSHIFTS SUDDENLY DURING NORMAL STREE DRIVING. VEHICLE WILL NOT GO ANY FASTER THAN 75MPH-EVEN ON A STEEP DOWNSLOPE. I CAN FLOOR THE GAS PEDAL AND CAR SIMPLY WILL NOT GO FASTER THAN 75MPH. I MUST SWITCH TO SPORT MODE TO GO ANY FASTER, BUT THEN AVERAGE RPMS ARE 300-350 AND VEHICLE USES TOO MUCH GAS. I HAVE OWNED IT ONLY 30 DAYS. PURCHASED FROM A DEALER. ONE PREVIOUS OWNER. ONLY 28000 MILES ODO. IDLES SOMEWHAT ROUGH AND SLIGHT KNOCKING HEARD FROM ENGINE WHILE OUTSIDE OF VEHICLE. HAVE HAD IT BACK TO DEALER WHO DENIED ANY PROBLEM, BUT GAVE ME NO PAPERWORK TO TELL ME WHAT WAS CHECKED. TAKING IT BACK TOMORROW. PROBLEMS ARE A SERIOUS DANGER WHILE DRIVING.