So I got an Athearn F59phi in HO Scale, it has the Amtrak Pacific Surfliner Operation Lifesaver paint scheme with the orange and the surfer. I love the look of the locomotive but it has an issue. Whenever I run the locomotive there is a grinding sound. Noticing the issue I replaced the motor and cleaned all of the gears, but I still have the issue. Has anybody else had this issue in the past? How did you fix it? Thank You in advance!