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Re: Jittery Motor
One thing we had to do this year is grind off the back of one of the pinion pins that is pressed in, to give it clearance. The pin was interfering with other components, and didn't sound healthy when running. That was a 5:1 gear set, but I would suspect that the same tooling is used to assemble 7:1 gear sets as well.
I would check all the components for other interference locations as well, there are a lot of moving parts that might cause headaches.
Other than the minor pin interference, we are very happy with the performance and flexibility of the gearboxes.
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