I HAVE A 2012 CHEVY SONIC LT AUTOMATIC WITH THE 1.8 LITER. THE CAR STARTED HAVING PROBLEMS AROUND 45,000 MILES AND HAS GOTTEN WORSE OVER TIME.THE CAR ON COLD START UPS HAS A GRINDING SOUND. THIS GRINDING MOST OF THE TIME ONLY HAPPENS ON COLD START UPS BUT DOES AT TIMES HAPPENS ON WARM START UPS. THIS SOUNDS LIKE METAL AGAINST METAL AND IT RATTLES. THIS SEEMS TO HAPPEN UNTIL THE CAR IS FULLY STARTED AND RUNNING. I AM GETTING CONCERNED BECAUSE IT IS GETTING WORSE AND LOUDER. *TR
2013
ENGINE
THIS CONDITION HAPPENS DURING FIRST DRIVE OF THE DAY OR AFTER THE VEHICLE SITS FOR A WHILE. WHILE ACCELERATING THROUGH THE AUTOMATIC TRANSMISSION THE CAR SURGES/JOLTS AT OR NEAR THE SHIFT POINTS. IT ALMOST FEELS AS IF I STARTED MOVING THE VEHICLE IN THE WRONG GEAR, IF IT WERE A MANUAL TRANSMISSION. THIS CONDITION ALSO EXISTS IF YOU START MOVING THE VEHICLE FORWARD AND THEN REMOVE YOUR FOOT FROM THE ACCELERATOR PEDAL AND COAST. THIS VEHICLE IS THE RS MODEL EQUIPED WITH THE 1.4 LITER TURBO. *TR