wheels spin at uneven rate when at full turn
 

Heya all, I have an issue with my scx10, suddenly when I turn full to either direction, the wheels get an uneven wheel speed, almost like it "surges." I am running VP 8* knuckles, and hubs, and Axial CVDs. The rest of the axle is stock. This was not a problem before, I am not sure why it started now. I have not messed with endpoints, it has been set at 100% since day one, But suddenly now when I turn fully to one direction or another this issue occures. Nothing looks broken or bent. The CVDs are running gunnar pins and they look fine. Any ideas or directions to look would be greatly appreciated. Thanks

At full lock, CVDs will tend to bind. Not because of bad equipment but by design. Try backing off your end points a bit or bring down your dual rate. This will save your servo too

Sent from a rock

Agreed try to limit the throw a bit. Easiest way is look directly on at eye level of the front axle while all powered up and slowly turn till the mechanical throw is at its limit for both left and right, and turn down the epa's. This is better twofold, you won't burn up the steering servo and the cvd's won't be thrown past their durable limits.

The sound you hear is possibly the cvd's past their limit, basically getting in and out of bind each revolution.

Re: wheels spin at uneven rate when at full turn
 

x3.

Re: wheels spin at uneven rate when at full turn
 

thanks for the info guys, Ill look at the steering. but i don't think its at the limit of the CVD, because when the truck is powered off, I can turn The steering further than the servo does. Its definately strange to me. I'm going to go look at it now, and turn down the EPA and see if it helps.

Re: wheels spin at uneven rate when at full turn
 

ok, I have messed with the steering and i am definitely not reaching the limits of the CVDs. I did notice today, that when moving on the slow side, I notice it also slightly when going straight, but much more pronounced when turning. If I happen to have some speed on, and turn the axle hops pretty violently. I looked at the transmission, and the axle. I do not see any glaring issues. Has anyone had an issue like this? It kinda has me stumped. Any info would be greatly appreciated.

Re: wheels spin at uneven rate when at full turn
 

Are you running the Wild Boar driveshafts?
The pins all need to be lined up or they will bind.

Re: wheels spin at uneven rate when at full turn
 

Pinion angle maybe put washers so its pointing more up instead of down stopped mine from hopping

Re: wheels spin at uneven rate when at full turn
 

ill look at my pinion angle, can i clock the axles with vanquish 8* knuckles? Also if it is Pinion angle, would MIP drive shafts allow for more angle? Just looking for any solution i can find. The suspension is all stock, I haven't raised the truck or anything, so I wonder why it would be too much angle. I will check the marks on the drive shaft and make sure they are lined up. thanks for the info guys.

Re: wheels spin at uneven rate when at full turn
 

I am still having this issue. I have upgraded the drive shaft to MIPs with the 10145 kit, and traxxas pins. I have torn down the axle to see whats goin on there, it all seems to look good. Here is a video of the issue I am having, hopefully you can see what I mean when I say the wheels move with uneven power. I know the tires are wonky, I just got some CI foams, to replace the stock ones, I have to remount the tires, as I cant seem to get them straight to save my life, lol. The issue started before I replaced the foams, and the shocks, as well as the drive shafts. all were done today since I had it all off, and it runs the same way. Please have a look at the video and let me know what you think. Thanks

Scx10 front axle issue - YouTube

Re: wheels spin at uneven rate when at full turn
 

did you put them shocks on or come with truck what size are they

Re: wheels spin at uneven rate when at full turn
 

those are 93mm gmade xd piggybacks. they are only 2 mm longer than the stock Icons which are 91 at full extension. But as I said, I had this problem with the stock ICON shocks. :(

Re: wheels spin at uneven rate when at full turn
 

if u put it on its back and put ur hands on the axials with a lil pressure while there turning does it stop and smooth out

Re: wheels spin at uneven rate when at full turn
 

Can you post up a video so folks can actually see or hear what is going on? It might help out a lot and keep everyone from guessing.

Re: wheels spin at uneven rate when at full turn
 

Turning it on its back, and applying pressure does not change anything. Post number 10 has a link to a video of what I am talking about.

Re: wheels spin at uneven rate when at full turn
 

did you disconnect the drive shafts doing other upgrades ?

looks like what mine did when I upgraded my links...

I put the drive shafts back together forgetting to phase them.
There are alignment marks on the shafts...
if these are not aligned correctly...
then it will cause a surge effect...
and if they are way out of phase...
then the axles will shake like crazy.

I was several splines off initially...
caused that surge and the axles shook badly...

fixed that but was still one spline off the marks...
still had a slight surge to the front drive.

check that your drive shafts are in phase.

another thing...

I found the screws holding the "C" hubs on
had loosened some... and created more slop in the axle.
Be sure to check and be sure that all the screws in the axle housing assembly remain secure/snug.

Re: wheels spin at uneven rate when at full turn
 

Sorry for over looking your video. Only thing I can think of is a locker issue of some sort. But since you say you have taken the axles apart to check things out I have to assume that is ok. Are the ends of the axle shaft that slide into the 3rd member (locker) good? Maybe there is slop in there that lets it jump now and a again.

Re: wheels spin at uneven rate when at full turn
 

thanks for the info guys, I am running MIP drive shafts, I don't think I have to index the drive shaft for them, but correct me if i'm wrong. I will undoubtedly take the axle appart again, and inspect the locker further. I do know that my screws for the c-hubs are not holding the strongest. I will do something about them. I do have bearings from fast Eddie coming, so Ill probably replace them as I tear into it, I already had one seize on the transmission, and one on the axle is not as smooth as the others, but it happens on both sides. Maybe it will take some slop out. I do notice some slop in the CVDs like the axle pin does wobble up and down a lil with the wheel off, something I discovered a lil bit ago. It is very minor, but who knows maybe that's part of it. I was just thinking too, there is some slop between the CVD shoulder and the bearing it passes through. Could this cause it, and would the new bearings fix this? I know that I can grab the wheel and "wobble" it just a hair. Just another question.

Ok, I think I narrowed it down to the ring gear in the axle. Took it apart to inspect the locker again, and while turning the input shaft by hand, I noticed a "bump" in the rotation. Could this cause it? I have the hd gear sets on order. I am out of town for the next week. Hopefully this fixes it. I am running out of things to replace. Lol.

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