Recently I was trying to do back flips with a Savage X 4.6 off the ramp I just built and crashed and burned hard. The motor runs but the truck doesn't move. I haven't taken anything apart yet to determine the damage but I was wondering if anyone could pass along some suggestions as to what to change to do better wheelies and back flips off the ramp? I'm guessing if I change the right gears(?) it'll change the torque? This way when I repair the damage I can just go ahead and change the right parts to help fly this thing. Thanks.