After a couple of light collisions my "sprite" 4 wheel drive RC car fishtails and (spins in a circle) when accelerating. It has been totally submerged in a giant mud puddle accidentally by my son. It was cleaned up, dried and it started 1st go. When holding the car off the ground the rear wheels spin and not the front wheels. I gave the car a good clean and couldn't see anything obvious, like a broken drive shaft??
Where could the problem lie?