So as some of you guys and girls know I just recently rebuilt my rear end in my cobra first of july. I have been driving it a few weeks now breaking it in and now putting the hammer down on it. I decided to take it to the track tonight and made two easy passes made a third at 6000 launch and it just slipped the new gears and diff just to the point to where the car will barely move its not in a bind or anything just makes bad noise and slips. Any suggestions of what it could be? I will be pulling it apart tom to see exactly what it is. Does anyone know if American muscle does warranty?