What kind of servo are you using, and more importantly what servo saver? The servo saver supplied with the car is too soft. What may be happening is what I refer to as snap steer. In this situation, the servo turns but the servo saver deflects. When the servo saver deflects it loads the spring on the saver, then suddenly the servo saver spring releases it's energy locking up the saver and jerking the steering wheels causing the car to kick the back end out. I use a Futaba 9650 servo with a solid horn. The servo has metal gears and is quite durable. The Recoil chassis is pre drilled to accept this servo and mounts are included in the parts bag. Hope this helps.