Ive got a 4wd 1/16 grave digger and since i bought a 3s lipo iv stripped my front diff twice with in a week (excluding weeks waited for parts ) the first time part 7082 stripped (the very inner gears) and now one of the teeth in the inner gears has broken and the ring gear has stripped (but not very much, there are just little chunks out of each individual tooth)

How do i fix this! what can i do?! can someone please list my options!?