Well, my move up to LIPO did result in breakage... :-) Likely my fault though!
The area between the clutch and the internal gearbox metal gear melted.
My guess it was the slipper clutch set too loose and the excess heat just melted the bearing seal and plastic gearbox housing...allowing the spur gear shaft to move inward...letting the drive pin to pop out of the top gear slot...no Slash movement.
I was running thru grass with a 2S and it broke after a 10 minutes on the 3S pack.
No big deal...$30 buys an entire gearbox. I can't believe the power this thing makes and endures...