My 2016 Sport has 36,000 (aprox) miles on it, and it is out of the 3 year warranty. Are rear axle bearings covered under the power train warranty? The reason for my asking, is I know that I have a bad rear axle bearing, and the noise is getting louder. I asked the Service Manager at the dealership, and she wouldn't give me a definitive answer. Said that it would have to come into the shop for a diagnosis, and then be submitted to Ford for warranty approval. If Ford denies the repair, I have to pay for the diagnosis, unless I have the work done there and pay for it.