Lightweight back gear diff axle shaft for 1/10 pan vehicle or 1/10 formula gear differential features tough shaft which particularly machined for perfect protection and smoothness with zero run-out for vibration-free procedure. Produced from HUDY Spring Steelâ� Lightweight design for repaid rotating fat. The axle replaces previous Axle Shaft #375017 and fits #374901 â€✠Gear Diff 1/10 Formula and #374902 â€✠Gear Diff 1/10 Pan vehicle. Note: please understand that due the smoothness kit differential as well as the forces and tensions included, the goods differential with both steel and graphite axle will are less resistant concerning the use and/or breakage versus standard ball differentials. If you're not worried about performance nevertheless the reliability and lifetime we suggest to do business aided by the main-stream ball differential.