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Tamiya F104 Grinding Noise

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Tamiya F104 Grinding Noise

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Old 02-17-2019, 03:33 AM
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Default Tamiya F104 Grinding Noise

Hi All,

Apologies for starting a new thread, but I'd really love to get this issue solved.

I've been racing my Tamiya F104W chassis, with no issues whatsoever. However, after taking it out tonight, I've noticed an abnormal grinding noise coming from the rear of the car. I replaced the spur gear before taking the car out tonight, as the original one was stripped. However, I'm still running the stock Tamiya pinion and spur sizes (17t pinion, 63t spur). Since then, I've noticed the grinding noise. I stopped the car immediately, and reset the tension on the differential, as well as reset the meshing of the pinion and spur. I also rebuilt the differential, and re-lubricated the diff balls with Tamiya Ball Diff Grease, but the grinding noise still occurs. I've also put some fresh oil on the motor to rule out that as being a cause. If someone could help me figure out the issue, that would be greatly appreciated. Everything I've tried so far isn't working!

Link to grinding noise:

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Old 02-17-2019, 09:20 AM
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What pitch is the new spur gear?
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Old 02-17-2019, 09:39 AM
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tamiya pitch ( mod 0.6 ) is not compatible with normal 64p spur gear
you need to find a new pignion 64P or a new mod 0.6 spur gear
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Old 02-17-2019, 05:53 PM
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your pinion is too tight to the spur gear i guess .
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Old 02-17-2019, 06:30 PM
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The pinion gear prolly looks like a saw blade the teeth get sharp replace pinion. They do it in the euro trucks funny but the plastic spur eats up the metal pinion or you have a blown out rear axle bearing.
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Old 02-19-2019, 06:03 AM
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Originally Posted by Quinny45 View Post
tamiya pitch ( mod 0.6 ) is not compatible with normal 64p spur gear
you need to find a new pignion 64P or a new mod 0.6 spur gear
This......
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