NHTSA Complaint #10376890 — 2006 CHEVROLET IMPALA

I AM WRITING TO COMPLAIN ABOUT THE 4T65E-HD TRANSMISSION IN GENERAL MOTOR'S LINEUP OF V8 POWERED W-BODY PLATFORM CARS. I HAVE EXPERIENCED MANY ISSUES OF THIS TRANSMISSION SLIPPING AND HESITATING ON ACCELERATION FROM A STOP. I HAVE BEEN EXPERIENCING THE ISSUE FOR ABOUT 30K MILES NOW. THE CAR IS NOT BEATEN, OR DRIVEN HARD AT ALL. ALL MY ROUTINE MAINTENANCE HAS BEEN DONE. I FIRST TOOK IT TO THE DEALER TO COMPLAIN ABOUT THE SLIPPING TRANSMISSION, AND EVEN THOUGH THE TECH FELT THE TRANSMISSION ISSUE, I WAS TOLD THAT UNLESS THE TRANSMISSION IS THROWING A CODE, THERE IS NOTHING THAT THEY COULD DO FOR ME. I HAVE PUT ABOUT $500 INTO WORK ON THIS TRANSMISSION SO FAR WITH MINIMUM SUCCESS. I HAVE FLUSHED THE TRANSMISSION TOTALLY, WHICH SEEMED TO HAVE FIXED THE TRANSMISSION FOR ABOUT A WEEK. ANOTHER THING THAT I ATTEMPTED PER THE RECOMMENDATION OF A GM MASTER TECH WAS TO CHANGE THE VALVE BODY. WHICH I DID AND IT CORRECTED THE ISSUE FOR 3 DAYS. NOW THE TRANSMISSION IS SLIPPING WHEN DRIVING ON THE HIGHWAY AT A CONSTANT SPEED/RPM.. ALMOST LIKE IT FEELS THE MOTOR IS MISFIRING. I HAVE CHECKED THE FLUID LEVEL, AND THE FLUID. THE LEVEL IS FINE AND THE FLUID IS NOT BURNT. I FEEL THAT GM NEEDS TO STEP UP AND RECTIFY THE PROBLEM OF THESE GARBAGE TRANSMISSIONS. I HAVE OWNED 2 OTHER CARS WITH THE SAME TRANSMISSION (95 MONTE CARLO Z34 AND A 01 PONTIAC GTP). BOTH VEHICLES EXPERIENCED THESE SAME ISSUES AND THE TRANSMISSIONS BLEW UP. WHY WOULD GM CONTINUE TO USE SUCH A WEAK MAJOR COMPONENT. I KNOW OF 100+ OTHER V8 W-BODY OWNERS EXPERIENCING THESE SAME ISSUES. *TR