Check this link to the Traxxas site.
Traxxas Warranty
For electronics outside of the 30 day warranty use
this form.
My experience with Traxxas warranty support was pretty good. I sent in a fried EVX outside of the warranty period. I got a replacement back in less than two weeks. Unfortunately the replacement was defective and I had to send that one back, Again, a replacement back in less than two weeks. The best part of all was the repairs should have cost me $25 but was done at no charge "as a courtesy".