I recently upgraded my magnum with cnc gears, everything was running good, I had to take the rear out to replace a toe bar screw, when I reassembled I used a piece of paper to set the gear mesh again. Everything looked good, this evening while running, the truck was acting as if it has a slipper clutch, from a dead stop to hard throttle the gears where turning but the wheels would not, from a light throttle acceleration the truck would go just fine until I got to higher rpm, could this just be the second gear need adjusting or is something else wrong?