i just traded 3 xbox 360 games for a 2.5 tmaxx, the guy told me straight up that it needed a little work, he said that the front diff wasn't working, but once i got it home i realized he was mistaken, the truck wouldn't turn at all, not the diff! i started by replacing the batteries, then i tried, still no luck, i unhooked the gear from the servo and then tried it and the servo works just fine, i put that back together and unhooked the bars that turn the wheels, they turned just fine, so i tried to turn the wheels while they were unhooked, both sides are really tight and take a little effort to make them turn, what do i need to do.