Need Help Quick---Spur Gear Wobble

[person123]

Hey, I need help quick because I'm going to the LHS in about an hour. I am just wondering if it is normal to have some wobble in the spur gear. It isn't up and down so I know that it is not the shaft. It is left and right and no, it isn't the small amount of play between the spur and shaft. More like if you took that amount of play, and added it to one side of the face of the spur. I am wondering if this is a bad thing, and if I maybe need to replace the sipper hub/plate/etc. I am reluctant to replace the spur gear because it is the HPI hardened steel one (I have an X SS).

I don't remember if it was like this before I drove it the first time. I broke the thing in during the driving part, with the slipper nut hanging by a thread (no pun intended:LoL. The spur was slipping like crazy, and I didn't think to check it. Since it was only the second engine I've ever broken in, and the first time I've ever driven a nitro mt, I thought it was normal. When I finally realized what was happening, the spur gear was actually flailing around on the shaft because the slipper was so loose.

Sorry for the long post, but please help quick. Thanks ahead of time.

Forgot to add that the slipper unit went back together normally. The little pins on the hub are still there, and the slipper plate and pads seem to be fine; they just have turned different colors from heat. The slipper is also working right/consistantly. The only thing that I can think of is that the slipper hub is warped somewhere in the middle where it wouldn't affect how it mounts to the shaft, or how the spur gear mounts to it. Or maybe it was a factory defect in the hub, or maybe it is normal to have some wobble, IDk. I don't think that it is the spur gear that is bent, because it sits flat on the pressure plate, on the hub; I doubt that both the spur and hub bent the same way because the spur wasn't even sitting on the hub when the damage would have occured.

Sorry to confuse anyone, just thinking out loud. Thanks again.

 

[Rolex]

Shouldn't be a problem. I had a Tmaxx with the same wobble. Eventually got a new one just for more speed. It did the same thing, but never affected the performance.

 

[person123]

OK, good. Anyone else have thoughts?

 

[flandersander]

Nope I think Rolex hit that one.

 

[Sarkasim99]

I don't think it's too big of a problem. My Savvy spur gear moves a little from left to right...I think it's the play in the transmission more than anything. Possibly where the slipper clutch its self hooks up with the hardened pin on the shaft so it can turn.

As long as that spur gear can't move away from the clutchbell.

 

[Gordz]

mine wobbles too, never used to, but it doesn't make any difference at all.

 

[Rolex]

It's apparently a warp in some of the spurs.

 

[person123]

Sweet, I'm glad I found this out before I bought a bunch of stuff to try and "fix" it. I did however pick up some new slipper pads because the guy at my LHS said that it could be that because the slipper was so loose, the pad got worn unevenly. Idk, the wobble is not changing my gear mesh (up and down), and apparently it is fine that way so whatever. Now that I think of it, my RC10GT has left to right spur gear wobble too. Maybe it is just a normal deal. Anyway, thanks you guys for the help. This is by far the best forum for good help

 

[Parputt537]

The wobble is caused by the spring under the nut. When the spring compresses it is not perfectly flat. Take the spring out and put some spacers in and tighten the nut down. The wobble will be gone. Some people have tried filing the ends of the spring to make it compress squarely, but to no avail. I ended up just taking the spring out all together and running an extra bushing in its place. I run my slipper fully tight so I really did not need the spring anyway.