My pinion is worn, or I want to change it what do I need? Robinson racing METRIC pinions last longer than the soft tamiya ones. My truck leans to the right-drivers side why is that? Typical of shaft drive, on the CR01 the shaft turns causing the left to sink under throttle. Stiffen the left rear spring by either pulling a front blue, or purchasing a spring kit and just install the blue spring on the left leaving the yellow on the right. I twisted my driveshaft, what can I replace it with? Traxxas Stampede shafts with the metal yoke or U-joint and Axial AX10 driveshafts and metal yokes are great once the shafts are shortened. I run a AX10 setup on the rear of mine and it's taken more abuse than the stocker did. I have a jato shaft, and yoke setup but haven't driven-tested it yet. Seems a little beefier than stampede shafts.