Tomy trains 2 speed gearbox repair

Hi There

The motors run in both cases, I've just realised one of the trains has a single speed box, I don't have a star screwdriver to open that one.

The single speed slips, occasionally it will move a little then the slipping crunch noise happens. The other 2 speed one just makes that noise with no movement.

I had thought that perhaps I could fix the gears so that there is no slippage I'd just have to make sure I was around the kids when they were playing with them so they didn't destroy the trains motors. However since the two speed box has two split gears then perhaps not.

I've not seen a single gearbox up for sale, I had hoped Tomy would have sold these as spares since they seem a unit, or someone would have made metal gears as a replacement.

I have enough blue track to justify buying a couple of new trains from eBay, I'll be making sure they don't use them unless I'm around.

Cheers