I'll give a "guess", but do you really need a 3R tune for what you're doing? Did you twist a shaft when stock? It could be that the tires are going from slipping / spinning to gripping in a hurry. The drive shaft can't handle that type of instant power surge. Results in a twisted shaft. Very similar to landing with the throttle on, spinning in the air, to instant torque / hook up when your tires hit the ground. Somethings got to give.