Originally Posted by
-R2-
yeah I would say the unversal is the wrong one, to tell if you have the right one in there it will have 2 round ribs in the middle of the shaft.
Yup... and when they wear out... replace them with the Kyosho ones. They last longer.
As someone said though, if your diff outdrives are really worn it could cause this. I have one with a slight chip on the "corner" of the slot, and I've had that happen ONCE.