Im mad at myself. I did something stupid. I was tightening the diff as the instructions say. I lined up the 2 slots, put an allen wrench in the slots and turned the left wheel. The directions to have it as tight as possible. I turned it like 3 times before something snapped real loud and now its toast. Im mad at losi b/c they werent clear at all on how tight it should be. And they didnt state anything about it being able to turn to far and break. Im mad at myself b/c that was jsut stupid. Does anyone know what broke? was it the gear? Now when I line up the slots and try to re-tighten the diff, it puts hardly any strain on the right side outdrive. Oh well, time to upgrade maybe.