Tamiya gear diff orings ?

[Rich D]

What orings are you guys using in the tamiya gear diffs ? I built mine as per instructions with the std black orings and they seem to be weeping quite badly

Thanks !

[qatmix]

I know its a dirty word, but you want to use Kyosho O-Rings.

I did a guide here. I have done this in my 501x (5.5t) and 417 (17.5) and they are smooth and leak free..

http://www.thercracer.com/2013/07/ho...gear-diff.html

[Carno]

Still need to get some Kyosho ones as well.
Esp. the rear diff likes to eject 90% of the oil within a few packs.

[djmcnz]

Yep, Kyosho red - tried everything else, these actually work.

[Rich D]

Thanks guys.

[5POINTSTAR]

This info is greatly appreciated. Just got a 417, also rebuilding 501X (big pulleys) with gear diffs on the way..

Big thanks

Edit: where do I find the TDX AC16003 smart shim?? Any help would be great. Also, if I use the Tamiya shims how many per side with steel bevels?

[Carno]

Just noticed this on Kentech blog.


42259 Gear Diff 5mm O-ring (red, 8pcs.)
- Inner diameter is slightly smaller than the (black) P5 size you are using in the current Giyadefu, will give the effect of suppressing the leakage.
- To take tension by tightening strong minutes, O-rings, frequent replacement becomes necessary.
- O rings x 8 sets

link

[qatmix]

Originally Posted by 5POINTSTAR

This info is greatly appreciated. Just got a 417, also rebuilding 501X (big pulleys) with gear diffs on the way..

Big thanks

Edit: where do I find the TDX AC16003 smart shim?? Any help would be great. Also, if I use the Tamiya shims how many per side with steel bevels?

You just need to have 0.3mm of shims either side of the bevel gears if using the Tamiya shims

[i4n]

As said by qatmix I just shimmed mine to make the seal a bit tighter when I ran a DB-01 with gear diffs. Didn't have any seepage then and it's still going strong with a friend who bashes with it and does no maintenance and there's still oil in them now!

I guess it does add a bit of extra drag to the action but that's the only downside I can see.

[5POINTSTAR]

Originally Posted by qatmix

You just need to have 0.3mm of shims either side of the bevel gears if using the Tamiya shims

Got TDX 0.3 shims and Kyosho O-rings. I followed your diff build guide and I'm very pleased with my 417 performance and no leakage!!

Also, got two gear diffs for my old 501X and I have a question.

What weight oil should I use in front and back (race on clay/dirt)? My thought is the weight should be the same for Front/Rear (I think?). Got AE 1000, 3000, and 7000 in hand.

Thanks again qatmix