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Old 04-21-2009, 12:10 AM   #1
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Default help; motor & spur gear grinding. TA02

hi fellow TA02 fans,
i'm having issues with my motor meshing correctly with the spur gear.

spur gear - Standard? (i think its the standard one that comes in the RTR but it has mantaray logo on it - any help here?)
pinion - 20T

it seems like its too small but when i use a one size larger 21T its too big.

closest i've got to fit is a 20T but then when on load, it accelerates & moves etc but makes a loud grinding noise.

its using a 8T motor and the motor mount is screwed on 20.
from what i can see, the gearbox/diff & spur gear is sitting firmly in place.

any help much appreciated.
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Old 04-21-2009, 01:10 AM   #2
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I heard people said that the spur in the box is not truly 48P even though it says it is 48p gear. You may want to try Kimbrough or Robinson Racing spur and pinion gears.
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Old 04-21-2009, 02:02 AM   #3
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If it is a Tamiya spur it is most likely a .04 pitch
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