[roystur44]

Check to make sure the tiny tiny pin in the sun gear didn't fall out. The pin is staked in and will easily fall out. After you'll hear a grinding noise and the transmission will bind and then free rotate.

We had that problem on our intake transmissions.

To solve the high power needed for the winch we are using the dual 18V -RS-775 on our Choo Choo at 300:1 plus the 18:84 gears. It takes 8 seconds to wind but it is strong. We designed our whole ChooChoo mechanism to be a drop in module cause we know how much torque is needed for these high powered catapults. They are bound to break.