Athearm loco help

[Anonymous]

I recently put a decoder in my Athearn GP-50, and when I put it back together, it worked extremely poorly. It sounds like something is rubbing, but I can figure out what it is. Maybe the motor? Any suggestions?

[Pennsy58]

Try repositioning the decoder location. My decoder would rub slightly against the shaft after putting the shell back on. Ran fine until I put the shell on. Just had to keep moving the decoder around until the rubbing stopped. If I recall, I wound up putting the decoder up front near the cab. Sorry, no quick answer for you..