The contact owns a 2015 Jeep Cherokee. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormal grinding sound. The vehicle was taken to the dealer, where it was determined that the power transfer unit needed to be replaced, but the part was on backorder. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 20V343000 (Power Train); however, the VIN was not included in the recall. The manufacturer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 105,000.