I've just got a new Slash VXL 4x4. After playing less than hour and no serious crashes the car's seering became strange: there is no matter if I turn the steering wheel left or right and then release it - the wheels do not go back to zero position, they may look left or right. And every time it is different. I try to ajust zero position with steering trim, it works, but after using steering wheel ones more - zero position is gone.

It is not a machanical problem, because I see how servo works, servo saver works fine it is not loosen or screwed. The problem is - every time I release steering wheel servo stops at different position. I guess that I need to setup something in TX or RX to solve this problem?