Hi thanks for the reply you are dead on. I think it is also from the drive cup his does leave a little ring around only on the front of the dogbone where they end up breaking. My sons is also the one from the trans to the rear. I think I will try and buy a new front and rear cup and some more dogbones and try that. I contacted Red Cat and they still do make the universals( cvd joints )but only for the wheels to the rear. That part number is 166015.