Okay, I have a Monster Pirate, and I was running it in the rain today (just a light mist really, but that's not the thing). Ran fine for an entire tank, then it was like, when I hit the throttle, the engine worked fine, but none of the power hit the wheels. when I turn the center differential gear, the clutch moves, so that's not it. but when i run the wheels on the ground or spin them or whatever, it doesn't hit the gears... Any clue what might be going on?

~Emily~