Hi I'm John I will help you with the problem.
in order to assist you better I require the model number please.
is the noise coming from the freezer section?
The model is located inside the fridge om the side or on the fridge ceiling.
See if the noise is from the freezer or from the back of the fridge please.
thats definetly a bad bearing in the freezer motor.
heres the motor you require .