Gears do not make noise (not the type you are describing) regardless of ratio. If it IS the gears, it will vibrate REALLY bad... Now lockers, on the other hand (especially Detroit) have been known to do what you are describing. So the big question is, what kind of locker do you have?
If you want to know if it is the locker, take a turn (either side, but make it a sharp one) while coasting, and then the same turn while applying power. If it is the locker (assuming an automatic one), you shoul dhave NO noise while coasting, and clicking and banging while aplying power.