Lightweight backside gear diff axle shaft for 1/12 pan car gear differential features tough shaft that's particularly machined for perfect stability and smoothness with zero run-out for vibration-free procedure. Produced from HUDY Spring Steel Lightweight design for reduced rotating weight. Fits #374900 â€✠Gear Diff 1/12 Pan Vehicle. Note: please be aware that due the type of the gear differential plus the forces and tensions involved, the apparatus differential with both steel and graphite axle will tend to be less resistant on use and/or breakage than the standard ball differentials. If you should be perhaps not worried about performance but the dependability and lifetime we suggest to use the typical ball differential.