2014 Cadillac Cts

The contact owns a 2014 Cadillac CTS. The contact stated while driving 20-30 MPH, he heard an abnormal loud roaring sound coming from the rear of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed that the rear differential had failed and needed to be replaced. However, the parts were not available. The dealer was notified of the failure and informed the contact that the parts were not available. The vehicle was not repaired. The manufacturer was notified of the failure but did not provide any assistance. The failure mileage was approximately 78,000.

I started to notice pulsation upon braking and replaced my pads and rotors, at the same time switching from winter wheels to summer wheels. The pulsation continued, and then I noticed a rumbling sound from the rear end that has grown increasingly loud over the past three days, and now it is accompanied by wobbling upon braking at speed. An independent shop today diagnosed it as a rapidly failing rear differential. The car has 70,000 miles and no accidents. As I understand it, the CTS-V version of the same vehicle has a recall for failing differentials that are the very same part that's used in these non-V models. The web is full of complaints from other owners of my model who are experiencing this same issue. It is a catastrophic failure part that could cause the rear end of the car to lock up at speed. Please address ASAP, thank you!

Burning smell, traction control, rear axle service along with suspension lights all came on the odometer. Shakes at low idle and wont stay running. Happened this weekend after pulling into the driveway after driving. We scanned code for cylinder 4 misfire. On scanner we had multiple other cylinder misfires but cylinder 4 is a dead misfire. We removed spark plug and found wore. We initially thought to start with replacing spark plugs and cylinder 4 coil. We consulted with customer and agreed to replace all spark plugs and cylinder 4 coil. After replacing we found no change in cylinder 4 misfire. We removed and re installed original coil and re tested. We performed a compression test on cylinder 4 and have 0 PSI. We thought possible carboned valve stuck open due to direct injection system. We performed a GDI carbon clean but still no change. We installed a borescope into cylinder to inspect and found what looks like a broken piston or part of a valv We scanned code for cylinder 4 misfire. On scanner we had multiple other cylinder misfires but cylinder 4 is a dead misfire. Weremoved spark plug and found worn. We initially thought to start with replacing spark plugs and cylinder 4 coil. We replace all spark plugs and cylinder 4 coil. After replacing we found no change in cylinder 4 misfire. We removed and re installed original coil and re tested. We performed a compression test on cylinder 4 and have 0 PSI. We thought possible carboned valve stuck open due to direct injection system. We performed a GDI carbon clean but still no change. We installed a borescope into cylinder to inspect and found what looks like a broken piston or part of a valve broken and smashed into the piston. Fault is internal engine, would need to tear down and re build or replace engine assembly. My safety was at risk driving 80mph on the highway perhaps engine could have seized or caused problems I’m not able to deal with along with having my infant and toddler in the car.

This is a continuing concerning issue that I've experienced resulting in a major safety hazard, that intel the RWD differential/drivetrain, which is a common safety concern with the 2014 CTS Sedans. There are no recalls from the persistent complaints and concern about this issue. The wearing down of the pinion seal, causing leaks, that have been repaired several times, which constantly reappears, after months to a year of being repaired at certified Cadillac dealerships. Now the GM/Cadillac dealerships are highly recommending a full differential replacement. Unfortunately, there are no differential parts nationwide to repair the issue. The GM manufactures have either discontinued the part or it's been express the parts are on back order from 3 to 6 months, or even up to a year to receive that particular part, yet there's still no recall on this issue. This safety concern needs to be address ASAP. This can prevent power to RWD, causing an accident at driving speeds, damaging the internal drive train as well. Other motorist, as well as passengers and vehicle operator would be at great risk, if this issue is not resolved. It's also costly and very expensive to repair. I have paid for a tremendous amount of money trying to get this reoccurring and repetitive issue resolved, without a reasonable resolution from GM or and Cadillac dealership to even offer a goodwill repair for this problem.

The contact owns a 2014 Cadillac CTS. The contact stated while driving approximately 5 MPH, there was an abnormal roaring sound coming from the rear of the vehicle. The vehicle was taken to the local dealer to be diagnosed. The contact was informed that the rear differential needed to be replaced. The vehicle was not repaired. The contact informed the dealer that the vehicle had experienced the failure listed in NHTSA Campaign Number: 20V038000 (Power Train). The manufacturer was notified of the failure and the contact was informed that the VIN was not included in the recall. The approximate failure mileage was 162,000.