NHTSA Complaint #10972288 — 2011 CADILLAC CTS

THE GM REAR DIFFERENTIAL IS DEFECTIVE ON THIS 2011 CADILLAC CTS I OWN. NHTSA DID AN INVESTIGATION ON THESE REAR DIFFERENTIALS TO INCLUDE THE 2004 TO 2007 REAR ENDS. THE SAME REAR END IS ON CADILLAC STS, CTS-V AND THESE REAR ENDS WERE CONTINUED TO BE PLACED BY GM, WITHOUT FIX, IN CADILLAC CTS UNTIL 2013. SAME DESIGN, SAME MECHANICAL PARTS. MY CAR IS A 2011 THAT JUST HAD A NEW REAR DIFFERENTIAL FROM GM PUT IN TO SOLVE ITS ISSUES. AFTER INSTALLATION, THE SAME PROBLEMS EXIST WITH A ROARING AND THUMPING NOISE THAT HAS BEEN VERIFIED BY REPAIR SHOPS COMING FROM THE OLD AND NEW REAR DIFFERENTIAL. THESE ISSUES ARE EITHER WITH THE SIDE DIFFERENTIAL CARRIER BEARINGS AND/OR THE RING AND PINION SYSTEM. GM HAS NEVER PROVIDED A FIX EXCEPT TO RECOMMEND A DIFFERENT VISCOSITY OF FLUID THAT ONLY QUIETENS DOWN THE NOISE. EVENTUALLY, THE REAR ENDS HAVE CATASTROPHIC FAILURE AND HAVE CAUSED, AS INVESTIGATED BY THE NHTSA, THE CAR TO SPIN AND INJURY OR WORSE RESULT. THIS ISSUE HAS NEVER BEEN FIXED BY GM AND THEY CONTINUE TO SELL AND INSTALL REAR DIFFERENTIALS FOR WHICH THERE IS NO FIX. I DISCUSSED THIS ALSO AT LENGTH WITH SERVICE MANAGER OF SEWELL CADILLAC IN DALLAS TEXAS AND THEY STATE THAT THEY REPLACE THESE REARS ALL OF THE TIME AND THAT THERE IS NOT FIX FOR THEM BY GM. I HAVE ENCLOSED MY COMPLAINT TO THE REPAIR SHOP THAT PUT THE NEW GM REAR END ON MY CAR WITHOUT EXERCISING THEIR DUE DILIGENCE AND RESEARCH AS TO INSTALLING A MAJOR COMPONENT ON A CAR FOR WHICH THERE IS NO FIX BY GM AND THE DISTINCT POSSIBILITY OF A FAILURE THAT WOULD CAUSE INJURY OR DEATH.