We also had this problem with one of the gear boxes in that the retainer began riding against the outside of the gear teeth. We only ran it for a minute or so before breaking it back down and finding the problem.
As suggested here, replace the retainers with the shorter set screws shipped with the gear box and you should be fine. Don't forget to use the loctite and grease the gears.
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Originally Posted by Leav
when i turned on all of the CIM motors in the transmission they make a really loud noise. is it ok? is it a problem with the chain or the motors or the transmission ?
or is it normal?
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