Tomica World/Plarail/Trackmaster Motor Types

This thread should really refer to gearbox types rather than motor types. The motors are all pretty much identical.

I'm not sure if you've got this one, but I'll put it here since I had it open. It's a single speed unit whose motor is driven from an under-chassis AA cell. Note in particular that it's absolutely essential that the top flat face of the motor is completely covered by a piece of insulating tape, otherwise the two steel rods/wires that run along inside the top of the gearbox casing will short-circuit against metal casing of the motor and you'll be taking it apart and putting it together numerous times, including repeated tedious work with the soldering iron, before you finally figure out what the problem is.