I have a few Athearn Blue Box locomotives that are very loud. They make a loud growling noise that doesn't go away with lubricating. The locomotives that make the noise are my 2 U33C's and my 1 U28C. I have only noticed this problem with these larger locomotives. Why do these engines make so much noise?
The answer to Big Ds question is found here in the original thread. This is a very common trait of the Athearn Blue Box locomotives. Additional search terms: drive motor universal lubricate pearl drops burr gear athearn axle toothpaste oil
