Help... diff. yoke & 1/2 shaft problems.
 

I have a traxxas nitro Sport.

My half shaft keeps poping off of the u-joint on the differential yoke. it dosen't break... it just pops off.

Any suggestions on how to keep this from happening? i was thinking about gettin the metal diff. yoke.... but I'm not sure that it would help any since the plastic half shaft seems to be the problem.