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Old 04-21-2020, 06:37 PM   #1
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Default Noisy trans? Metric 48 pitch

My CFX is super noisy. When the motor is out the drive train is quiet. When itís in its loud. I read somewhere about metric 48 pitch. Is this a thing? Any other ideas? I took tranny apart again everything is right. When the truck is rolling sometimes it quiets down. Thanks


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Old 04-21-2020, 08:15 PM   #2
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Default Re: Noisy trans? Metric 48 pitch

Yes indeed. The truck requires a metric or mod 6 pinion, they are used by MST and Tamiya primarily. A "std." 48p gear will eventually lunch the spur. Makes a heck of a racket too.
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Old 04-22-2020, 10:50 AM   #3
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Default Re: Noisy trans? Metric 48 pitch

Just to clarify terminology for you - Metric 48P isn't a thing. It's either 48p OR metric. As was mentioned you do need a metric pinion gear, but it's called Mod 6 not 48p. To be completely clear, 48p is NOT compatible with Mod 6. Your pinion and spur both need to be the same spec.

If your drivetrain is loud once the motor goes in and you're using the correct gear, you may be setting the gear mesh too tight.
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Old 04-22-2020, 11:38 AM   #4
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Default Re: Noisy trans? Metric 48 pitch

Like others have said, you need a mod .6 pinion. Whenever I do need that pitch, I use the Robinson Racing ones since a lot of the other options are made of rather soft materials.

Robinson Racing Products - 0.6 mod motor pinion gears
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Old 04-22-2020, 11:38 PM   #5
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Default Re: Noisy trans? Metric 48 pitch

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Originally Posted by OSRC View Post
Yes indeed. The truck requires a metric or mod 6 pinion, they are used by MST and Tamiya primarily. A "std." 48p gear will eventually lunch the spur. Makes a heck of a racket too.
Thank you. I got it now
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