NHTSA Complaint #11569758 — 2013 FORD EDGE

Put car in for regular service, and to investigate burning smell and transmission slippage. Mechanic found that the Power Transfer Unit (PTU) was completely filled with a paste-like sludge. (he has pictures) Mechanic says that the PTU is too close to the catalytic converter, therefore overheating the PTU and literally boiling the transfer fluid. He was able to clean the module, but says there's still a leak around the PTU seal. The work required to replace the seal, would also merit replacing the PTU. BUT, this is a $800 part! The safety risk would have been my transmission completely seizing up and causing an accident due to mechanical failure. The vehicle has had all of it's regular and milestone service work performed. No warning lights went off. I'm on borrowed time with this part and/or new transmission. Will there be a remedy to prevent this in the future?