Another question, some of the plastic gears are cracked on the drivelines. Where can I get the metal replacement gears or does anyone have another suggestion?

Thanks. I have a board in the tender that has a plug in the 8 pin socket. I assume this is not a DCC unit? Can I assume it only needs the DCC decoder and sound plugged into the socket?

I bought a used HO 80 ton Shay and am new to the hobby. How do I determine if I have a DC or DCC loco?