I have a T Maxx 3.3. It starts fine and seems to idle ok. When I give it slight throttle it moves but when I give it full throttle it just screams and smokes but only moves slowly. Won't go up hill at all just sits there and screams and smokes. When I pick it up and give it throttle all 4 wheels are turning. Any ideas?

Toys - Traxxas - T Maxx 3.3 Monster Truck