NHTSA Complaint #10616593 — 2008 GMC ACADIA

2008 ACADIA PURCHASED IN 2007, TRANSMISSION INTERMITTENTLY SLAMMING INTO GEAR FOR HIGH SPEED UP AND DOWN SHIFT. ON DRY PAVEMENT THE SUV WILL CHANGE SEVERAL MPH WELL WITHIN A SECOND. MY CONCERN IS THAT THIS IS POTENTIALLY DANGEROUS WHILE DRIVING IN INCLEMENT WEATHER. ESPECIALLY ON SNOW/ICE! I AM TAKING THE SUV TO THE DEALER ON MONDAY FOR A DIAGNOSIS. I SUSPECTED AN INTERNAL CLUTCH PROBLEM OR VALVE CONTROL PROBLEM COUPLE OF WEEKS AGO. THE PROBLEM IS PROGRESSIVELY GETTING WORSE. AFTER READING ONLINE I FOUND THAT THIS IS A COMMON PROBLEM WITH THIS SERIES OF TRANSMISSIONS STARTING AFTER 47K. I WANTED TO ADD MY CONCERN. MY CAR JUST PASSED 63,000 MILES. I TRULY BELIEVE THIS IS A POTENTIAL SAFETY HAZARD. SEVERAL THINGS WOULD HAVE TO HAPPEN AT ONCE (IE LET OFF THE ACCELERATOR, ACCELERATE, BRAKE, AND BE ON WET OR ICE ROADS). THE SHIFT IS INTERMITTENTLY HARD DURING ANY OF THESE CHANGES IN ACCELERATION CAUSING A POTENTIALLY DANGEROUS CONDITION. *TR