I just used the stock idler shaft from the stock tranny. Worked fine for me. I actually don't think that an axle shaft would work.
I bought a hole plastic trany case just for the shaft then:031: realized it was the same 5x11 bearing. I think a cut down axle shaft or a top/spergear shaft would work just fine. why do think that wouldnt work RC?
By axle shaft, do you mean a CVD or dog bone? You would need to be sure that they are the right diameter, and somehow keep it in place like the original shaft was. I actually think it could work, it may just be too much trouble to make, when it is so much easier just to use the original.
I don't really understand. Would you use a modified driveshaft because it's stronger? Otherwise it's not worth the effort to modify one to fit. I've never heard of anybody breaking an idler shaft, at least not in a Rustler.
RC it would be the axle stub. whats nitro the flm trany case does not come with the idler shaft so if you are not swapping parts you will need the shaft.