Replaced the drive truck on a SD45 because the brass gear was  worn.  Problem is still present, there is slippage as you hand turn the motor and give some resistance to the wheels and the motor is securely fastened to the truck.  Anyone know if you can replace the brass on the end of the motor shaft, or must you purchase a new motor?

I have an older Williams GG1 powered and dummy with sound.  It will say the start-up sounds and the horn will blow when button pressed, BUT while in motion the horn will start blowing a lot of the time and pressing any button will not make it stop.  You have to kill the power to make it stop and soon after restarting the horn blows again.  I tried cleaning wheels and  power pick-up roller.  Removed shell and can't find anything  loose around the board.  Any suggestions or thoughts would be greatly appreciated  PRR fan in central PA

Does anyone know a source of individual large scale Bachman parts other than company itself?