b4 sounds like a tractor???

[captainlip]

ran my sp v3 yesterday and all was well till i went to crazy on the big jump and the motor came out, screwed it back in, checked the spur and pinion all is fine yet it sounds like its clicking as its going along, a bit like a diesel, im wondering if its the diff? as the motor is okay and its not up against the spur to tight either, what should i be looking for or what could be causing it as it sounds really rough.

thanks.