[HKGhost]

That's caused by bad shimming and having to turning up the motor height to compensate for it. Basically the bevel gear sat too high and so the motor had to be turned all the way up to engage the teeth, but it also pushed the gear up and out of place. Over time like this, the side pressure not only chewed up the axle but elongated the bushings. That's why you can see that the elongated bushings is inline where the motor is going up. I always tell people that you need to check the shimming when a new motor is installed, as not every motor are the same dimension. Everyone needs to recheck their shimming every time you change the pistol grip or motor cage, motor, gears, bushings/bearings and gearbox shell.