I don't know anything about either of those trucks, but I could point you to a thread you may find useful.
[link=http://www.rcuniverse.com/forum/m_3986531/anchors_3990134/mpage_1/key_stampede%252Ce%252Dmaxx/anchor/tm.htm#3990134]Pede or E-maxx[/link]
Oh yeah, and maybe try the search button next time.