Those of you using the Traxxas Ctr diff

[Just go Play]

IMHO you are more likely to find the excessive unloading of power to the front wheels annoying enough to remove the traxxas CD before you will break one. There are of course exceptions to that obviously, but it seems that most people find that high powered brushless systems and the traxxas CD just don't work well together. Having only 2 spider gears the CD does not have much internal resistance (compared to say 1/8 scale CD's ) which requires you to run very heavy oil/lube to compensate.