Ledgendary is correct the newer TMAXX's are having lots of engine trouble, a few friends are super pissed at Traxxas right now, however, my older TMAXX with an OS engine in it...would not replace it at all..the truck minus the stock Traxass engine is so tuff and parts are readily available at all LHS everywhere!!

A fix to the tranny issue is to remove the reverse gear and replace with forward only keeping the 2 speed forward is awesome, I am going to convert mine soon, a friend has already done it and big difference..also Grampi a regular on this forum just recently removed his revers and was singing the praises right here on RC UNIVERSE..My $0.02...good luck and go Nitro or go home!!!