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I have an Athearn GP35 BB with a newer Athearn motor, trucks and decoder that makes a loud grinding noise when I increase the throttle full forward. It sounds like it is rubbing on something but I just can’t find where this is coming from. But on the reverse, it is quiet with no noise. It started when I installed a sound decoder that I later fried. I have since replaced the sound decoder with a motor only decoder from Digitrax. I just do not know what this is even after taking the entire engine and trucks off, lubricating the gears and re-installing everything. Any thoughts or suggestions?
JRP
Does it do it with the shell off?
Does it do it with the shell off?
Yes, on and off. I'm beginng to think the wheels are being "pulled along" for some reason. Yet I have taken the wheels off and they
move freely on the truck gears.
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