Wanting to know if anyone has heard of or has ever broken a right rear shaft or cv joint on there car with a stock converter only. I hear about the manuels breaking them often but not any automatics yet. I am getting ready to put my new BFG drag radials on and thinking about upgrading to the stronger shafts if i need to. I will most likey not run a aftermarket converter but am seriously considering the 3.15 gears for my car soon. Do i need them or not?Thanks!