RE: 4s lipo in a TC3, drive shaft issues
It is aluminum, Ive never heard of a carbon one. If I could find a carbon shaft, that would fix my problem. But it might also create another one if its not strong enough for the torque load.
But I tried driving it with the new shaft, and I found out this^ is just a secondary problem. I completely destroyed my rear diff gears (i.e. teeth missing from diff gear, completely bald pinion) in about 30 seconds of somewhat gentle driving, so I have a lot more research to do.
Thanks for the response though.