Well, the last time I ran my Rustler it got stuck under a branch and I tried to power out of it (stupid, I know). Now, this is what I get, my pinion and spur are okay I think it might be something wrong with the tranny. here's a quick 40 second video to help. Thanks!
http://www.youtube.com/watch?v=oB3FJhEgT0Q&sns=em