Motor shaft broke

had to remove the belt and drum and then remove the motor and replace it...put the belt on and then the hard part was to get the drum in place without the belt coming off. New Motor works quieter than the old one did, so I assume the dryer came with a defective motor to begin with and then the shaft finally broke. It runs very quiet now, but never did before. Even a service man came when it was new but said that was normal. Now we know it was not....there was a problem from the start.