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Old 12-30-2011 | 07:58 AM
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messiah1
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Originally Posted by got_nitro
Is the flat spot on the motor shaft rounded out?


Have you tried to make it tighter with a quality hex tool, not the L shape tool that comes with most RTR kits?


Is there any unnormal vibration in the motor/trans area that could be loosening the grub screw?
The flat spot is good on the shaft. The only unnormal vibration I can think of would be hard landings...and I have not tried a quality hex tool. I'll have to see if I can pick some up.

I've read of people putting locker on the motor shaft and the pinion itself to help hold it. Is that a good idea?
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