He tried to put down way more then the trans could take!
This truck just found it’s weak link… When you have a high power car or truck that makes way more power than ever intended things can and will break. You just have to hope the things that break aren’t that expensive. This guy just broke one of the things that is really expensive, his transmission. He was just building up some boost on his STS turbo kit and trying for a burnout when boom everything fails!