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what kind of noise is it? Is it gear noise, motor noise, or the wheels rolling on the track? Gear noise usually never goes away, as the gears are "spur cut" meaning the gears are cut at a 90 degree angle to the body. This type of gear makes noise since the gear teeth actually slap each other( much like when the teeth of a zipper interlock). The other type of gear is a "helically cut" gear, which is cut at a 45 degree angle. These gears make little, to no noise, as the gears rub each other the entire time they are meshed. Therefore, eliminating the slap. To put it another way, if your car has a manual transmission, you don't hear anything driving forward, but you get that howling noise in reverse, the forward gears are helically cut, and the reverse gears are spur cut. Also spur cut gears are stronger than helically cut gears. Motor noise can be from a dirty commutator, or worn out armature bushings. A proper cleaning and lube MAY resolve that problem.If it's wheels on track noise........it can be reduced, but if you hold a section of track in your hands and put a train car on it, it will STILL make noise, even when the sound won't transmit through you holding it, it will still be transmitted through the air around you, so forget eliminating it, it's the forces of friction and sound transmission( Laws of Physics)I hope some of this was useful to you. Good Luck
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