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  1. #1
    RC Qualifier
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    Rhythmic tail wagging at high speed

    Has anyone ever had their erevo's rear sway back and forth at high speed? almost as if a dog was wagging its tail back and forth if you know what i mean. its not slow, but not fast either, but it makes it impossible to control at high speed.

    i have done the following troubleshooting:

    - its not steering slop, as it still drives in a straight line
    - tires are new and balanced
    - dogbones are new and not bent
    - wheel wobble is as good as i can get it
    - tsm is off
    - happens on 4s as well as 6s
    - diffs are rebuilt with oil

  2. #2
    RC Champion grizzly03's Avatar
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    How is your wheel alignment? Toe-out can cause sway issues.
    http://www.competitionx.com/rc-tuning-toe-in-toe-out/

  3. #3
    RC Turnbuckle Jr. olds97_lss's Avatar
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    Quote Originally Posted by grizzly03 View Post
    How is your wheel alignment? Toe-out can cause sway issues.
    http://www.competitionx.com/rc-tuning-toe-in-toe-out/
    For bashing, I usually have a little toe-out on the front of my trucks. Makes them less "twitchy". With zero toe in/out, they wander pretty bad. With toe-in, they are more sensitive to input which makes them too twitchy for someone like me. A lot of either will sap away speed, make them harder to drive and chew up the tires when driving on concrete.

    I usually run my rear tires straight or a hair of toe-in if it's adjustable.

    I'm not sure what camber does, but I try to run my with zero (straight up/down) camber.
    https://www.youtube.com/c/olds97lss

  4. #4
    RC Champion Acidic01's Avatar
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    Are the wheel nuts on tight?

    Sent from my Pixel 3 XL using Tapatalk

  5. #5
    RC Champion grizzly03's Avatar
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    Quote Originally Posted by olds97_lss View Post
    For bashing, I usually have a little toe-out on the front of my trucks. Makes them less "twitchy". With zero toe in/out, they wander pretty bad. With toe-in, they are more sensitive to input which makes them too twitchy for someone like me. A lot of either will sap away speed, make them harder to drive and chew up the tires when driving on concrete.

    I usually run my rear tires straight or a hair of toe-in if it's adjustable.

    I'm not sure what camber does, but I try to run my with zero (straight up/down) camber.
    Fronts are personal preference. Some like toe-out and others toe-in. I run mine with a very small amount of toe-in in both the front and rear and I like how it handles. But toe-out in the rear wheels can cause what the OP is experiencing.

    For camber I have mine with a small amount of negative camber in the front. And none in the rear. It seems to help with the predictability of the steering.
    http://www.competitionx.com/rc-tuning-camber/

    Also you can try changing your caster. It will help with the "twitchy" steering.
    http://www.competitionx.com/rc-tuning-caster/

    Also if the bump-steer isn't setup right that can cause "twitchy" steering also.
    Last edited by grizzly03; 08-08-2020 at 02:00 PM. Reason: added caster link

  6. #6
    RC Qualifier
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    thanks. i run 0 toe in the front, little toe in on the rear. my wheels are on tight.

    my steering is okay, as it does pretty much run in a straight line. on its back, i dont have any chassis shake either, it feels very solid. however when my throttle hits 75%, it starts to wag back and forth. its really frustrating, cause ive replaced everything i thought i'd need to to resolve it.

    i was just curious if anyone had ever experienced the same thing and could say 'oh its because of x'

  7. #7
    RC Champion grizzly03's Avatar
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    Do you use the Traxxas BT Link? If you do it can be overlooked that the TSM setting is still on.

    Also what are you running on. Off-road or on pavement? Your sway could be the tires ballooning.
    Last edited by grizzly03; 08-08-2020 at 06:16 PM.

  8. #8
    RC Qualifier
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    yep i have the bt link. with tsm on i notice it more. i run on pavement. ive tried it with belted trenchers, and the sway is 10x more than with the 2.0 talons. so i dont think its ballooing, but more something to do with the weight, momentum, of the car at high speeds. ill try and get a video next time im out

  9. #9
    RC Enthusiast
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    I have noticed this I think it is the tsm


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  10. #10
    RC Competitor
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    I have a similar problem with my 1/16 Rally. Those tires are hard, so I don't think it's ballooning. I'll be watching for solutions.

    Sent from my SM-G955U using Tapatalk
    I find your lack of teepee disturbing.

  11. #11
    RC Enthusiast
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    Iíve noticed with 100k fluid in my diffs it dose not happen much


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  12. #12
    RC Competitor
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    Next diff will get 100k, then.

    Sent from my SM-G955U using Tapatalk
    I find your lack of teepee disturbing.

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