GT31

Hi,

What is the purpose of metal drive shaft? I have the stock one, I realize it rattles when using a faster motor. So I changed it out to an aluminum, now it would only rattle during higher speed, but still, didn't solve the rattle problem, did yours fix it? I have a 9T brushless, thanks

https://www.youtube.com/watch?v=zM8sJerZBCc&feature=youtu.be

collector1231

My Feedback: (1)

Did you swap around the front and rear shafts on accident when building? Also, a bit of vibration is completely normal.

GT31

I don't think there is front/back for the shaft, it's not just vibration but also flex at high speed, so you hear the cracking sound like the stock shaft does (but at higher speed)

GT31

Added video! please help!

collector1231

My Feedback: (1)

I see now! It looks like you are missing the rubber O rings inside of the cups to help stop the vibration. Either that, or did you see this picture?

O rings; http://www.jegs.com/i/Traxxas/430/23...L-IaAnrT8P8HAQ

GT31

What is first picture you are trying to show??? Mine didn't come with o ring

Maj_Overdrive

My Feedback: (11)

I have a TT01 sitting on the shelf. I thought it was hilarious having the plastic center shaft and hearing it slapping the chassis. It slaps the chassis because it's flexing, flexing from being out of balance. That's exactly what's happening with your aluminum shaft. It's not perfectly balanced and apparantly is flexible enough to bend at higher rpms and slap the chassis. Nothing you can do about it besides trying a different aluminum shaft.

GT31

Interesting, do you mean my aluminum shaft is defective?

Maj_Overdrive

My Feedback: (11)

Defective isn't the word I'd use. I highly doubt the manufacturer of your (or any shafts) actually balance them. The issue is more with the flexibility of the shaft. For arguments sake let's say it's out of balance by 1 gram, multiplied by centrifugal force at high rpm and that weight may be 10 grams, either way it's enough to make the shaft flex and slap the chassis. Buy another shaft from the same manufacturer and it's going to be just as flexible but the balance might be better or worse. A shaft from a different manufacturer may be less flexible and able to better mask how out of balance it is though.

GT31

I used YeahRacing, any other recommendations?

Maj_Overdrive

My Feedback: (11)

Please don't ask what manufacturer has a stiffer shaft (insert crude joke here!), I have no idea. I've never heard of issue with the Tamiya aluminum shaft though. And all this also assumes the drive cups on the ends of the shaft are tight and not wobbling around at all as that would just make matters worse.

Edit: this post was written without having read your last post, saw your question coming

GT31

The drive cups are tight, only thing that wobble slightly is the shaft, I can move the shaft back and forth slightly but won't come out of the cups. Is this normal?

Maj_Overdrive

My Feedback: (11)

Being able move it in and out of the cups is fine and normal all it does is make a slight rattle if anything. Orings in the cups will prevent the shaft from rattling around in the cups but it won't prevent the shaft from bending and slapping the chassis which can be clearly seen in the video.

GT31

For some reasons, when I look at the TT01 Manual, it shows 3 bearings are supposed to be behind the front drive cups, but when I open mine, only found one. I don't think I could fit anymore though, how come??

GT31

Anyone please?

collector1231

My Feedback: (1)

Its fine then. If it works, it works. Maj is correct about that. But you should still try the O rings. Also, click on the sentence for the pictures. I hyperlinked it.

GT31

I asked what are you trying to show in the picture, as I couldn't relate. You didn't respond.

collector1231

My Feedback: (1)

I just did respond... did you see the picture and the piece of plastic circled in red? Its hard to miss.

GT31

If I had not seen the picture I wouldn't have said no correlation. What are you trying to show please elaborate. It's hard to miss TT01 in the title.

Maj_Overdrive

My Feedback: (11)

P3 is a spacer, RB1 are bearings/bushings. The only reason I can think of that you can't get another bearing/bushing in there is because there's already a bushing in there. It may be black and hard to differentiate from the plastic of the diff housing.