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Cotton differential pinion gear broke

Discussion in 'Kraton' started by DenisNew72, Oct 3, 2016.

  1. DenisNew72

    DenisNew72 Well-Known Member

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    Hello all my friends , colleagues will share with you the news of the last rollers of the craton , we see the result : the bursting of the satellite in the center differential, oil filled 10K

    IMG_20161003_131800.jpg

    IMG_20161003_131839.jpg

    I'm surprised that he's so fragile and small and thin just funny))).... Please suggest is there a more reinforced the satellites ? what ? under the replacement
     
  2. Vanning

    Vanning Well-Known Member

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    How long did it work before it gave up ?
     
  3. DenisNew72

    DenisNew72 Well-Known Member

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    It's almost new , first ride after service, a couple of jumps and he grunted

    Now I think what he broke?
    1) Or a factory defect
    2) or very brittle metal quality poor
    3) or backlash
     
  4. yonzariq

    yonzariq Well-Known Member
    ArrmaForum Fan

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    Well you also have to keep in mind that things like this can always happen and are not necessarily a bad product or factory defect...

    You can always try and contact Arrma for a warranty replacement :)
     
    DenisNew72 likes this.
  5. Vanning

    Vanning Well-Known Member

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    I bet every so often one of those gears is made with an air pocket in it. It looks like a cast....and you may get a defective one. Also....everyone has a different driving style. And setups. Some peoples setup and driving style is just asking for breakage. Others can go all season without busting anything. However...a defective part is what it is. A weak spot.
     
    DenisNew72 likes this.
  6. DenisNew72

    DenisNew72 Well-Known Member

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    Thank you.
     
  7. Mike'sGN-Kraton

    Mike'sGN-Kraton Well-Known Member

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    What was the outcome on this as the same happened to me today. Truck is only a few weeks old, anyone have a good place to get a replacement? Or is this from arrma only? Thanks in advance...Mike 20161112_180349.jpg
     
  8. Kauaiguy

    Kauaiguy Well-Known Member

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    I buy on Ebay,bought a complete spare diff for $25.Need to use thicker center diff oil,shim the diffs.
     
  9. Mike'sGN-Kraton

    Mike'sGN-Kraton Well-Known Member

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    Awesome, thanks. I found a couple on ebay. I've already sent an email to arrma maybe they'll Warranty it. I also just placed an order with tower and included a bunch of spare parts...thanks again.. Mike
     
  10. Trickelitrick

    Trickelitrick Supporting Member!
    Supporting Member ArrmaForum Fan

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    Same happened to me twice...always the bottom gear in the cup .....shimmed with 5x15x0.3mm....never had any diff issues after that.....and i have been very mean to my kraton :p
     
  11. Rich Duperbash

    Rich Duperbash Well-Known Member

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    You're not alone on this one. I broke both center diff IMG_20161116_115141133.jpg planetary gears after a drag race gone bad, involved quick flip over and land. I think wheels free spun and then planted hard causing stress, but have since put in TD planetary shims and 2 extra satellite shims along with 100k center fluid in Typhon. Took all diff slop away, runs great.
     
  12. chalmene

    chalmene Well-Known Member

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    I have broken 2 of these also, seems to be a weak point for us. Like Vanning said, they are cast. I have gotten ones with small chips too, luck of the draw I guess.
     
  13. Rich Duperbash

    Rich Duperbash Well-Known Member

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    They definitely look cast. I'm hoping proper shimming helps, I only run 6s and don't want to worry about stuff breaking like I use to with my Slash. I'm sure if it's an ongoing issue either Arrma or aftermarket support will offer an upgrade. Until then, still going to bash hard within reason and without any abundance of caution. These rigs are awesome!
     
  14. chalmene

    chalmene Well-Known Member

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    I do hope an upgrade is available soon, but I don't let it affect my driving. I bash pretty hard and it has been months since i have broken one. I do believe it is a matter of just getting a "bad one".
     
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  15. Jake17958

    Jake17958 Active Member

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    Where can I get the shims to make sure my diff is tight I broke my center and rear diff both today and ordered all new differentials
     
  16. stewdogg

    stewdogg Well-Known Member

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    Looks like the Team Durango diff shims are out of stock in a lot of places. They didn't say they were out of stock here:
    http://www.activepowersports.com/team-durango-td310476-satellite-gear-shim-set-10-td310476/

    Tekno also has the same dimension diff shims:
    http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=TKRC0145&P=FR&atrkid=V3ADW3A24148B_39159633250_pla-308698363869__201979541663_g_c_pla_with_promotion__1o1&gclid=EAIaIQobChMI1PTA_ZOg1gIVzLbACh2MdAaXEAQYASABEgL-S_D_BwE

    Just search for diff shims with the 6x17x.3mm measurements and you should be fine.
     
    Rich Duperbash likes this.
  17. rag6

    rag6 Well-Known Member

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  18. Rtappy1985

    Rtappy1985 Active Member

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    Do not order anything from active power sports they eill say in stock yhen tge next dsy will send an email saying out of stock after taking your money. Happend to me on a couple orders. I woukd avoid them st sll costs.
     
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  19. Camo

    Camo Well-Known Member

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    Those TD shims have been out of stock for ever bra :mad: Mugen are the shit I have them in the Outcast. The Tekno shims are 6mm internal not 5mm so are a little loose. I used them in the Kraton because they where easy to source. So far so good haven't had any probs with them. ;)
     
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  20. stewdogg

    stewdogg Well-Known Member

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    Thanks, I bought two packs of the TD shims a couple years ago, so I'm set for a bit.

    Good to know the others that will work.
     
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