I have a Lionel Big Boy that when going down a grade (about 4.5%) produces a very noticeable clicking sound (sort of like gears mashing??).
The speed control works well in keeping the engine from running away but I was wondering if this is a normal sound or does it need to be lubricated or sent in for service?
It happens all of the time and even when there are no cars behind it.
Thanks.
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