Hi guys so I have had a problem recently. So I was driving my nitro rustler and all of a sudden at around 30mph or higher, most of the time it will turn right with out me telling it to do so. It turns really sharp that sometimes it flips. So I called up traxxas and they said to change controllers. I have a stampede so I used that one and it still turned right. Then I put my stampedes receiver and servo in the rustler and it still turns right. So now I'm really confused. I looked at the bell crank and bulkhead and they are in good condition(no cracks).

If anyone has some ideas, please let me know