Transmission grinding.

[Oh How Original]

Just built up the transmission and I have about 1.7mm of in/out play on the top shaft that the spurs on.
When it's pulled out, everything spins freely as you'd want, when it's pushed in, it's harder to turn and there's a grinding.
Obviously something isn't quite right, but I've had it apart once and put it back together exactly as the instructions say, yet the symptom is still there.
I have a longish spacer left over though, but there is nowhere it could physically fit, I do wonder if this is a common issue and what the fix is?
Just before taking it apart to inspect again.

 

[Traulus]

If i did understand the top shaft has a play and this is the fix

https://www.amainhobbies.com/vanquish-products-scx10-ii-chromoly-top-shaft-vps08106/p581715

 

[Oh How Original]

If i did understand the top shaft has a play and this is the fix

https://www.amainhobbies.com/vanquish-products-scx10-ii-chromoly-top-shaft-vps08106/p581715

Thanks for that, I'm in the UK though, didn't really want to wait several weeks

 

[Traulus]

Well,vanquish products are not available in Europe.Only States or China.From States takes abou 10 working days

 

[Oh How Original]

I usually order from RCmart, postage is cheap and usually pretty fast.
I just didn't expect to have to buy an upgrade part to build it right from the box.
That's very poor on Axials part, which is a shame as I am highly impressed with the rest of the kit so far.

 

[Traulus]

Yes,they do have couple of fixings to do out of the box,nothing major thou

 

[Oh How Original]

I'm not accepting that... I appreciate the link, but you shouldn't have to fix a major manufacturers mistakes.
Time to send them an E-Mail.

 

[Taper]

Thanks for that, I'm in the UK though, didn't really want to wait several weeks

Delivery time to Spain took 7 to 10 days and is very cheap

 

[Oh How Original]

Delivery time to Spain took 7 to 10 days and is very cheap

Ohh I can get the part I'm not happy about a known problem not been fixed by them though, so sent an E-Mail off, see what reply I get.
I'm not in a rush to run the truck, the weather is bad here anyway so no big deal if I have to wait a little to actually run it.

 

[retro77]

Are you building the kit up? Double check that you have the correct bearing in the correct place. I want to say I had a similar issue and it turned out that there are two VERY similar bearings.

edit: I see your other thread, doubling down on checking them bearings.

 

[Crawler Cads]

Can't you shim it OHO? Two of my rigs had the same problem, one fixed by shimming the gearbox end and the other fixed by going with a super shafty beefy top shaft[emoji106]

Sent from my Pixel using Tapatalk

 

[NitroDarwin]

Thanks for that, I'm in the UK though, didn't really want to wait several weeks

Here is what I did used extra hole in shaft for 2speed option and added pin thru plastic spacer holding gear on its pin.

 

[Traulus]

Ohh I can get the part I'm not happy about a known problem not been fixed by them though, so sent an E-Mail off, see what reply I get.
I'm not in a rush to run the truck, the weather is bad here anyway so no big deal if I have to wait a little to actually run it.

Probably they will reply that is normal to have that play

 

[Oh How Original]

Are you building the kit up? Double check that you have the correct bearing in the correct place. I want to say I had a similar issue and it turned out that there are two VERY similar bearings.

edit: I see your other thread, doubling down on checking them bearings.

I'm not sure where I could have put the wrong bearing, I saw some are 10mm and some are 11mm, so I check with my caliper which are which, having had it apart three times, I am confident they are in the correct places.

Here is what I did used extra hole in shaft for 2speed option and added pin thru plastic spacer holding gear on its pin.

Thanks for that, I might give that a try.
I put a spacer between the bottom bearing and the end, assuming that could fit it once it's all in place, but I was sadly mistaken.
It's still frustrating when you pay several hundred for a kit and it's got a pretty obvious problem and they just totally ignored it.
I sent them an E-Mail expressing my frustration at there views on quality control.

 

[JoelTGM]

Does every kit have this problem? Mine seems to run fine but I never looked specifically at this part.
edit: Hm I have the RTR version and just noticed "(Fits SCX10 II Kit Only, Does not fit on RTR Version)"
I guess mine is different?

 

[Oh How Original]

Does every kit have this problem? Mine seems to run fine but I never looked specifically at this part.
edit: Hm I have the RTR version and just noticed "(Fits SCX10 II Kit Only, Does not fit on RTR Version)"
I guess mine is different?

From my research, around 3/4 of people have the issue with the kit version.
We seem to suspect it's due to the 2 speed capability.
They should make the gear on the shaft completely toothed (not sure on correct terminology :lmao: ) so it wouldn't make if it moves any.
I can't see a single reason the gear has the smooth bit on it.

 

[NitroDarwin]

As far as grinding check if it goes away by flipping the second gear I and others had to do that, and the play in the top shaft is from the pin slot in the gear enables the shaft to move outward. The bearing in my pic is against the gear when installed and the pin should sit all the way in the gear but there is nothing to keep it from moving towards the bearing

 

[Oh How Original]

As far as grinding check if it goes away by flipping the second gear I and others had to do that, and the play in the top shaft is from the pin slot in the gear enables the shaft to move outward. The bearing in my pic is against the gear when installed and the pin should sit all the way in the gear but there is nothing to keep it from moving towards the bearing

My gear is already the same way round as yours is in the picture you posted up.
If I flipped it over (it's only slotted in one end for the pin) it would grind on the other side of the gear anyway, so I can't see anything to be gained from that.
Unless I've misunderstood.

 

[NitroDarwin]

My gear is already the same way round as yours is in the picture you posted up.
If I flipped it over (it's only slotted in one end for the pin) it would grind on the other side of the gear anyway, so I can't see anything to be gained from that.
Unless I've misunderstood.

Talking about the flipping the other gear. The top gear in the pic is where the shaft in and out play is

 

[Oh How Original]

No, you can't, that's the same gear I was talking about, I did wonder about grinding away the smooth part of that gear though, that's what the problem is.
Well, I tried something today and it appears to have worked.
On the same parts tree that the plastic spacer tubes come on, there is two small washers, I forgot about them to be honest but saw them today and wondered, so out came the tranny, put one of the washers behind the end bearing and voila, fixed, tiny little bit of movement in the shaft now, but NO grinding lol.