Hey guys, I just got a used summit off a friend. I'm not new to RC but never owned a summit. The truck won't go into high gear. It will stay in low or just rev and grind a little. The grinding is not often or really loud and where it stays in low 1/2 the time when I try to put in high, could it be the servo or end points not letting the tranny parts move all the way out of low and into high? Do you think the problem is inside the tranny? I want to make sure the servo and linkage is set right before I spend the time pulling apart the tranny. My buddy bought the truck new and as far as I know he never touched the linkage or adjusted the end points for the servo. How would I make sure the linkage is set right? Thanks for any help. Other than that, the truck runs great. I love it!