The motor is brand new. It is hard to describe the noise, but it is similar to the noise the old motor made when a bearing went out. It sort of sounds like a shaft is wobbling- a rRr, rRr. We tested it without a load here at home and it made the same noise. For some reason, it did not do the same at the pool store. I do not understand why the pool store is balking at replacing the motor. It is still under warranty and I would think that just the fact that we are unhappy with the way it sounds would be a reason to give us a new one. I don't want to wait until next summer, have it quit working ,and have to pay for another new one. Unfortunately the motor was made in China.
Thanks for your help.