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Tamiya gear diff or Spec R for 416/417

Tamiya gear diff or Spec R for 416/417

Old 09-29-2012, 10:22 PM
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Default Tamiya gear diff or Spec R for 416/417

I am interested to buy a gear diff for the 416, but it seems i have the choice of buying Spec R or Tamiya Brand. i seem to notice that the tamiya brand is a little cheaper. What i want to know is , are both brands 37T or 38T in pulley size. also which one is more leak free and durable?
Your input and experience is very much appreciated.
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Old 09-30-2012, 06:55 AM
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Tamiya gear diff is better than Spec R . If you buy a spec r you have to change the rear shaft .
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Old 09-30-2012, 07:50 PM
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Originally Posted by Akita View Post
Tamiya gear diff is better than Spec R . If you buy a spec r you have to change the rear shaft .
hey thanks a lot for the reply akita. Could you tell me the reason why the rear shaft must be changed?
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Old 09-30-2012, 09:01 PM
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Here is the difference.



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Old 10-01-2012, 05:37 AM
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Originally Posted by JoeyE View Post
Here is the difference.



ohh i see, the outdrives are different?
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Old 10-07-2012, 10:33 PM
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i just bought the tamiya white gear diffs and they are very posh. however i am having trouble tightening the little 4 black screws to close the diff, seems all my drivers dont fit. anyone know what size allen key to use?
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Old 10-07-2012, 10:47 PM
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Originally Posted by alcyon View Post
i just bought the tamiya white gear diffs and they are very posh. however i am having trouble tightening the little 4 black screws to close the diff, seems all my drivers dont fit. anyone know what size allen key to use?
Yea, those screws are a weird size. I ended up using my small sizes torx bit.
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Old 10-07-2012, 10:49 PM
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Originally Posted by alcyon View Post
ohh i see, the outdrives are different?
Other being white in color, that is all I also see being different. There is a upgrade coming around for replacement metal gears soon~!

Where did my pictures go? I'll have to check the link.
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Old 10-09-2012, 07:42 PM
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Thanks JoeyE. Does anyone know what weight of oil does tamiya include on the 9cc bottle given with the gear diff? There are no viscosity markings on the bottle at all !
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Old 10-09-2012, 09:13 PM
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it is a 1.5mm bit, i had issues at first to find a driver and used imperial drivers, but i think they are poor quality heads on the screws that make a 1.5mm difficult to fit in sometimes with new screws.
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