Rear axle short shaft issue?

[Tonysmini]

I emailed Axial after rebuilding mine with HD gears and new lockers and mine wouldn't go back together.

Hope they will ship a replacement to the UK.

[malekia]

Thanks for posting the photo. I have the same problem as others, though my calipers don't show a difference in the collar-to-shaft-end distance between my short and long shafts. At the same time, my collar thicknesses are equal.

Bought the 3 days ago.

Originally Posted by Sh0rtBus

And since I know there isn't a pic up yet that shows a comparison between the old shaft and the new one with the updated collar, I figured I'd post one for others to see in the future.

[V.O]

I switched my shafts this weekend but the stock motor is still getting too hot. Do you think its because of the stress that occurred (starting smoking) before I switched the shafts? I'd like to get it all fixed before I put in my Holmes Torque Master pro and have that burn up too.

[malekia]

Called Axial today and was told they would send me replacements.

He was surprised that my recently purchased kit (from a high-volume dealer) had this issue. I don't know how recently they corrected this issue.

[merauder]

Just ran into this axle problem on my kit build. Called Axial and they said they are shipping new parts no questions asked. Thanks Mark @ Axial, this is how customer service should be!

[4RunnerKid]

Brandon hooked me up with replacement shafts for mine. solid customer service, right there... thanks again, man

[ScaleReady]

I have two rear axles with that issue. Wonder if they would warranty it still, since I got them used..

[322]

I have an early kit, e-mailed them last night and had a response this morning and they are on the way. Great customer service.

[ScaleReady]

Originally Posted by 322

I have an early kit, e-mailed them last night and had a response this morning and they are on the way. Great customer service.

I emailed them saturday and have yet to get a response.....I understand they are not open on the weekends, but it is now the end of the day tuesday. I'm sure they'll get to it.

[malekia]

I would call them. I called on a Monday and received the replacements by Friday.

Originally Posted by ScaleReady

I emailed them saturday and have yet to get a response.....I understand they are not open on the weekends, but it is now the end of the day tuesday. I'm sure they'll get to it.

[ScaleReady]

Originally Posted by malekia

I would call them. I called on a Monday and received the replacements by Friday.

Good call on that. I should have called. Here it is, basically a week later, and ZERO response

[slimfire]

Hallo all,

got same issue but on RTR version, actually since I drove the stock configuration all was fine and smooth. Just replaced the diff gears set with Heavy Duty from Axial and experienced the issue with the rear short shaft...
My RTR configuration came with the diff gears mounted as for the Wraith's manual (on page 15), however while installing the HD gear set I got the issue in the rear.

swapped the direction of the diff (ring gear towards the long shaft instead of the short one on in the rear) and it works perfectly, however I do not like to run it this way for 2 main reasons:

1- The HD gear set have spiral gear tooth and the standard direction works better for the thrust force (I read that the better configuration for spiral gears is in a way that the "The hand of the spiral should be selected so as to cause the gears to separate from each other and not to force them together, which might cause jamming.")

2- I am going to mount the diff covers by RC4WD (ARB design) and If I use the inverse direction of the diff gears the diff covers have to be mounted upside down resulting in the text "ARB" being also upside down....


So technically the solution I like the most is to mill out half of a mm the housing in the ring gear where the stop ring of the shaft is interfering and applying the un-desidered force that makes the gear meshing too tight...(even hard to rotate by hand) however it is not nice having to rework brand new parts made for Heavy Duty usage...

getting the upgraded short shaft from Axial is an option but I do not like the "weak design" due to the extremely reduced thickness of the stop ring/slope...which seems to be sort of an knife... and not very robust.

However, this thread was very useful for me even if I experinced such an issue only this week.....

Thanks and keep you posted!

[BoardN88]

After I put in my HD gears and HR lockers I had the same problem with binding due to the rear shaft. I emailed Axial this morning I hope they send out the "new" style short shaft!

[Swampy]

I got my kit this week from Tower and it has this same issue. I grinded the gears bad when I put the axle end cap on the short side. I drilled the bevel (ring) gear and it is super smooth now. May see if I can get the updated part for later though I should I ever get the HD bevel gear.

Thanks everyone in here for the info.

[slimfire]

I deduced the thickness to 0,4 mm of the flange and it works fine, I did not want to drill the HD ring as I assume it would be hard to tool... However the flange now is really thin and I guess not robust enough in case of heavy side crash..... I'll test it and see. PS: emailed Axial customer support and they re addressed me to the dealer in Europe where I live and bought the kit, too PITA and much quicker to do it myself! ;).


Slim

[05Fronty4x]

I'm sad to report that this issue has still not been resolved. I got a kit today with the very same problem, and ruined my ring gear trying to drill it out a little. I made the mistake of using a hand drill and the bit grabbed and drilled out the entire section that the flange is supposed to butt up against.

[Natedog]

Originally Posted by 05Fronty4x

I'm sad to report that this issue has still not been resolved. I got a kit today with the very same problem, and ruined my ring gear trying to drill it out a little. I made the mistake of using a hand drill and the bit grabbed and drilled out the entire section that the flange is supposed to butt up against.

Wow, over a year ago and still this problem exists? Good reason to buy the HD gear set I guess.

[05Fronty4x]

Originally Posted by Natedog

Wow, over a year ago and still this problem exists? Good reason to buy the HD gear set I guess.

To be fair they have revamped the shaft, but whether or not they are included in the newest production kits, there are still some being sold with the old one.

I've spoke with a number of people over at Axial and all of them have been very helpful and have made sure I'm taken care of. They are a huge hit in the RC world and backing their product with top notch service plays a big role.

[Bonanza]

I am in the process of building my new Wraith Kit, it was just bought from lindinger.at
I also have the same problem with the short rear axle binding.
Contacted Axial and they are sending the correct and improved axle.
But because i dont want to wait for the new part i also bought a set of rear axles manufactured by Topcad (part number 23010).
Problem is that they are even binding more... !!
I cant believe it.

Just to make 100% sure that i am not doing anything wrong, has anyone measured the length of a proper one between the flange that that the outer bearing sits on and the inner flange that sits against the diff locker?

My old wrong one is measuring 71.05mm (2.797inch) and the Topcad 71.38mm (2.81inch)
The Topcad binds so bad that the axle almost dont turn around.

[MNorby]

Having same problem too with my old RTR axles. Right after I got it I added rear steer and swapped ring gear position at same time. Now going back to a solid rear axle and short side doesn't fit without binding up the gears. Still worth contacting axial about this years later you suppose?