I'm confused
both my son and me have run a gear diff and ball diff at batley indoors and cullingworth , currently both ball diff , a lot of racing friends have said a ball diff for slippy floors is the way to go , but we were both quicker with a gear diff ! We ran 1 shaft and 2 gears and 700 shock oil in them , the rtr 210 comes with a gear diff and rear motor and the demo vid shows it on slippy dirt , aren't the idea of rear motor and gear diff contradicting each other ? Anyhow I'm building 2 more cars with gear diffs so we can try both at the same meeting