Careful, Iffy module can break dowels and/or the joint where output shaft meets pot metal part.
Dowels are a mechanical "fuse" that beaks before gears get stripped, etc. Sometime the output shaft joint strips first.
What color are the old dowels? Maybe dowels was replace before and now the "Weak Point" is output shaft joint and/or the gear teeth.
Some have done pins/screws to fix the pot metal. Of those... many have problem later, like Broken the pins/screws, output shaft, etc.
some of How system works etc...
See my Cave, Gen 2 HL Motor
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)