DURING ACCELERATION (TAKING FOOT OFF ACCLERATOR STOPS NOISE) A GRINDING NOISE APPEARS TO BE COMING FROM REAR AXLE OR TRANSMISSION. NOISE IS INTERMITTENT, OCCURS APPROXIMATELY 4-5 TIMES PER WEEK. HAVE NOT BEEN ABLE TO IDENTIFY UNIQUE CONDITIONS THAT CAUSE OCCURRENCE. NOISE WILL GENERALLY ONLY OCCUR FOR A SINGLE ACCELERATION AND AFTER IT GOES AWAY, IT IS UNKNOWN WHEN IT WILL RETURN.
2011
POWER TRAIN
WHEN I AM SLOWING DOWN TO A STOP THE TRANSMISSION WILL SUDDENLY MAKE THE VEHICLE SURGE FORWARD QUICKLY. IF I NOT JUST AS QUICK TO APPLY A FIRM BRAKE I RISK HITTING THE CAR OR PEDESTRIANS NEAR ME WHICH HAS HAPPEN ON SEVERAL OCCASION. ON ONE OCCASION, AS I WAS TURNING INTO A PARKING SPACE THE VEHICLE SUDDENLY SURGED FORWARD SO FORCEFULLY THAT IT CAUSE THE FRONT LEFT BUMBLE TO TRAVEL OUTSIDE THE PLANNED PATH AND HIT A BRICK COLUMN. THIS PROBLEM ONLY OCCURS IN SITUATIONS WHEN I AM SLOWING DOWN, I.E. MAKING TURNS, TRAFFIC LIGHTS, PARKING, ETC. IT CAN BE FRIGHTENING WHEN IT OCCURS UNEXPECTEDLY. RECENTLY TOOK INTO LOCAL CHEVROLET DEALER. THEY ACKNOWLEDGED THE PROBLEM AND SAID CHEVROLET ENGINEERS ARE WORKING ON A FIX WHERE THE TRANSMISSION'S COMPUTER IS ALTERED. BUT THEY DIDN'T SEEM CONFIDENT IN THE OUTCOME. *TR