yup, mine did the same thing when i was doing donuts in the grass. these things have so much touque that if you see a wheel balloon too much it will break a drive cup, mine was like someone cut it with a laser it was so smooth and sheard in half. that is the only thing that broke on mine and a rear shock from a high jump. besides that these trucks are very durable for 17lbs.for diff oil setup look at the cen racing page and click on their setup for the nemesis or the genesis le very informitive. mine are all stock except for 50wt in the front and 70wt in the rear shocks, for those high jumps.