Dredd planet not turning

[paddythegreek]

Was asked to look at a mates JD as the planet had stopped turning. The motor/gearbox are running from what i can see through the open end of the gearbox inside the gearbox but nothing is moving outside.
I've actually removed the complete assy (not a 5min job either) and got 12v onto the motor. The gearbox looks a sealed unit so are these units available either new or second hand or is it repairable or a common fault. Thanks Ken

 

[BigIan]

It’s a common enough fault I believe.

This guy fixed the gear problem himself
https://pinside.com/pinball/forum/topic/judge-dredd-planet-gearbox-revealed-2

 

[paddythegreek]

Looks like i got to strip the box then and hope it's a gear come loose on the shaft. I have got these 1/8" roll/spring pins from my engineering days.