striping spur gears.

hey guys with my emaxx i keep striping the spur gears on it. like i dont even drive it for that long. maybe like 2 mins and it goes. i konw my gear mesh is right and its not that im jumping it. its just driving it on the street. i thought it was the sliper so i changed it all out with a new one and it was not that tight and it was sliping alot and sow when i went to tighten it the 2 medal things on the out side of the spur wear trought the spur and cause it to brake in the center. i have friction pegs in all the holes.

if any of u had this problem what did u do to fix it.

or what can i do to fix it.

thanks