I gotta think that shaft was overhardened to shear like that - or it was damaged at some other time. The tires on these trucks cant provide enough friction to transfer the amount of torque to shear metal like that.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES