First Time Drive Yeti - Clacking Noise

[SilicaStorm]

Well after a long wait the Yeti arrived and the past week I replaced many of the plastic parts with upgrade aftermarket aluminum.

Now I go out for my first drive and have a clacking/chattering noise.

1) was already bind together with controller
2) adjusted trim for steering L/R to be centred
3) put the Yeti on the ground and gave some throttle
4) the Yeti just jerked back and forth with no acceleration with the Clacking noise
5) gave the Yeti a push and then it was off and running smooth
6) 10 min of forward driving I had the Yeti stop with the braking
7) now the Yeti is back to this jerking movement / no acceleration / clacking noise

What is this and am I required to do some calibration for first time use ?

[dextan22]

you have to do a process of elimination to narrow out the possible culprit. isolate front diff, tranny and rear diff, etc. does it sound when you run it off the ground?

[SilicaStorm]

Yes when I lift it off the ground it makes the same noise/jerking

[impulse2010]

Spur gear? Mine went out and it was making weird noise and got to where it would not even pull up a hill, Now I am stuck waiting over a month to get one....

[SilicaStorm]

Yes that is where the noise sounds like it is coming from,,, but this is a brand new Yeti,,,, how can the spur gear be gone already,,,, ?

[the_ocho]

Because multiple people have said they come setup loose. Mine was

[SoCal Crawlr]

Hard to tell you over text. could be several things, or a combination. would take you two seconds to pop off the spur gear cover and eliminate that.

[SilicaStorm]

Ok,,, opened up the spur gear and looks ok to me,,, but I never looked at one before....doesnt look stripped...

[antd91]

Your Mesh looks really loose I would tighten that up.

[CrawlinMike]

Yeah lol. Shavings everywhere. Fix that mesh!

[SilicaStorm]

No shavings that is sand...

Tightened the mesh,,,, did not solve the issue,,,, think must be something in rear axel....

off the ground front axel turns easy,,,

off the ground rear axel does not turn easy

[SoCal Crawlr]

Great! now remove one or both sides of the rear driveshaft. only one screw per side and you can remove the entire thing. this will make your car fwd to see if the problem is in the rear axle

[SoCal Crawlr]

As far as the front axle turning easier than the rear be sure you're actually spinning both front tires. the front has a differential the rear does not, so if you spin one of the front tires you'll notice the other one actually spins the opposite way. totally different feel so remove that rear driveshaft and then plug it in and run it while you're holding it up.

[SilicaStorm]

Ok,,, Im with you so far SoCal,,,,

Just removed rear axel and powered up,,,

Nothing,,, just the green light in the ESC beeping,,,, no FWD,,, no wheels spinning !

[SoCal Crawlr]

okay so if the rear axle is disconnected and the same problem is there, obviously that's not it. hopefully you still have your spur gear cover off but If you can either remove the pinion from your motor, or set the mesh so that the motor is able to spin freely without engaging your other gear. then go ahead and power it up. if you get the same problem, the rest of your truck is fine and most likely I'd guess it's a faculty esc, in which case Axial would be able to help you out

[SilicaStorm]

Ok,,,, I power up the controller first as always

.... and this time when I power up the car there is a series of beeps,,, then 5 seconds silence and then a couple more beeps,,,,

.... and power to the drive train,,, no problems everything is ok... :-\

only difference is not always I hear these series of beeps on start up....

[binaryterror]

Originally Posted by SilicaStorm

Ok,,,, I power up the controller first as always

.... and this time when I power up the car there is a series of beeps,,, then 5 seconds silence and then a couple more beeps,,,,

.... and power to the drive train,,, no problems everything is ok... :-\

only difference is not always I hear these series of beeps on start up....

Sounds like the issue is:
Radio/receiver = not working well (also read up on the trims and such on the radio)
ESC has an issue (check wires are attached good)
Motor has an issue (check wires are connected good)

[SilicaStorm]

Well after an almost complete tear down,,, Axial sent a Yeti with no quality check

1) the "C" power lead from the motor was NOT soldered,,, only held together with the shrink wrap,,, !!!

hence why sometimes the connection was good,,,,

thanks to all for you help in isolating this factory defect !

[Diskfunktional]

You have a motor plug that is loose. Check your ABC connections on the ESC. My solder was poorly done on my yeti. Same symptoms.

[RustenPaines]

Yea that sounded like a brushless motor esc issue. Good thing you figured it out!