Have Ford Questions? Ask a Mechanic for Answers ASAP
We have seen the motor mounts fail on these engines and also the water pump. There is one mount on the passenger side of the engine next to the belt, one under the battery which is called the transmission mount and an anti roll mount under the vehicle towards the back of the engine.
When the water pumps go bad, the water pump pulley will vibrate and wobble and cause the belt to squeal when the engine is running.
Is it a Ford Extended Warranty or an aftermarket one?
Most warranty companies require us to take transmissions and engines apart for their inspectors to come and see what the problem is so they can actually see the problem. That is normal even with a Ford extended warranty.
There is a 99% chance it will be covered. They usually ask for you to approval the cost of tear down till they find the problem and then the warranty company will cover the repair. You will only have to pay a deductible if you have one.
The transmission will not always set a trouble code unless there is an electrical failure inside the transmission. As for the mount, they should have seen it. But I cannot speak for them as I personally cannot see your vehicle or the mount.