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  1. #1
    RC Racer
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    Differential blew up...

    Week old car. Pretty sure something in the differential blew up, making a high pitch whine/ grind. What's the best course of action parts wise? I haven't gotten into it yet but when you break something in the differential, what do you usually do upgrades wise?

  2. #2
    RC Champion Acidic01's Avatar
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    It may just be a spur gear. Depends on where the sound is coming from.

    If break a ring gear or something in diff. Just replace with stock.

    I like to use plastic spur gears so that it is the weak point and easiest to replace.

    Sent from my Pixel 3 XL using Tapatalk

  3. #3
    RC Qualifier FoxhoundEP3's Avatar
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    Quote Originally Posted by Acidic01 View Post
    It may just be a spur gear. Depends on where the sound is coming from.

    If break a ring gear or something in diff. Just replace with stock.

    I like to use plastic spur gears so that it is the weak point and easiest to replace.

    Sent from my Pixel 3 XL using Tapatalk
    yup ^^ , check spur and pinion first, you'll know when you see it.
    Summit.Erevo 1.0.Slash 4x4.Stampede 4x4

  4. #4
    RC Racer
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    So switching to metal isn't advised? What could I have done to cause this? Does it need lubrication?

  5. #5
    RC Champion Acidic01's Avatar
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    Being on the throttle when your landing a jump.

    As soon as you are in the air let off the throttle. Can give some input if needed to nose up or break to nose down. But need landing must be off throttle or you will strip spur gear eventually.

    Metal spur gear just means something else will break instead.


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  6. #6
    RC Racer
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    Ok now, how do I check and how do I remove? Is a metal cover advised or just for show?

  7. #7
    RC Racer
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    If its a week old, tear down both front and rear diff to inspect and the center transmission. Sometimes traxxas lets vehicles out the door without adding enough lube. I run 50k weight diff lube and 20 million for center tranny. It is very easy. In fact if you would like i am about to do mine in the next hour, front rear and center. I could FaceTime you and walk you through the entire process.

    Sent from my SM-G988U using Tapatalk

  8. #8
    RC Champion Acidic01's Avatar
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    Quote Originally Posted by Live2Fish88 View Post
    Ok now, how do I check and how do I remove? Is a metal cover advised or just for show?
    It's one screw to take the spur/pinion gear cover off.

    Pictures is on mini Revo. As my 2.0 is in my truck right now. And same general location.

    Also search YouTube or google tons of vids. Just search car + part to be replaced.

    Metal cover is only for show.

    Sent from my Pixel 3 XL using Tapatalk

  9. #9
    RC Racer
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    All the teeth on the larger plastic gear are flat. Every. Single. One. Any ideas as to why?

  10. #10
    RC Champion Acidic01's Avatar
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    Replace spur gear check pinion to make sure no damage.

    Improper gear mesh or being on the throttle when landing a jump.



    Sent from my Pixel 3 XL using Tapatalk

  11. #11
    RC Racer
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    Quote Originally Posted by Acidic01 View Post
    Replace spur gear check pinion to make sure no damage.

    Improper gear mesh or being on the throttle when landing a jump.



    Sent from my Pixel 3 XL using Tapatalk
    Isn't the gear mesh set at factory?

  12. #12
    RC Champion Acidic01's Avatar
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    Quote Originally Posted by Live2Fish88 View Post
    Isn't the gear mesh set at factory?
    It is but who knows if done right. Should always check car over after taking things out of box. And things could of been built wrongly. Screws not tight. Pinion set screw not tight. Things in the wrong spot. Ect.

    Sent from my Pixel 3 XL using Tapatalk

  13. #13
    RC Champion grizzly03's Avatar
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    I got rid of the factory preset adapter and set my spur and pinion mesh manually. There was too much play using the factory presets.

  14. #14
    RC Racer
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    I was able to remove it. I see in the manual it says something about a piece of paper between the gears? So if they mesh properly why is metal gear sets bad?

  15. #15
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    metal gear will transmit more abuse through itself downstream to other components. If plastic, and encounters sufficient abuse, it will let go and save components further downstream.

    If it is easier to get at and replace than other components downstream, better to let it stay and be the weak link failure point. If you are landing jumps with throttle, try to not and see if it lasts longer?

  16. #16
    RC Qualifier FoxhoundEP3's Avatar
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    Yeah if you are doing backflips, let go of the throttle When you land as mentioned above
    Summit.Erevo 1.0.Slash 4x4.Stampede 4x4

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