Help! Just tried to use my Emmet Kelley 040 (roustabout?) to test my track layout, and the gear between the motor and driver stripped out. Is there a replacement for it, whether its just the gear or the whole gear box? I think it might be a version 4? It has a hump in the bottom cover between the rear driver. Also what type of lube grease is used on these gears?

I also have this problem with the 040 roustabout locomotive in a Kelly Jr Train. Is there anyplace to get the gear, or the whole gear box? Beleave its a version 4? It has a hump in the bottom cover between the rear driver.