DRIVING IN MILD WINTER CONDITION (LIGHT WET SLUSH) ON A MAINTAINED HIGHWAY MY 4RUNNER BEGAN TO FISH TALE. WHEN AN ATTEMPT WAS MADE TO CORRECT THE FISH TALE NO CONTROL INPUT FROM THE DRIVE WOULD CORRECT THE SLIDING MOTION. THIS CAUSED THE VEHICLE TO SLIDE TOWARD THE SHOULDER OF THE ROAD. ON THE SHOULDER OF THE ROAD THE VEHICLE BEGAN TO SLOW TO ALMOST A STOP, HOWEVER, THE REAR END WAS FAR ENOUGH OFF THE SHOULDER THAT IT BEGAN TO BE PULLED BY GRAVITY DOWN HILL. WHILE IT SLID DOWN HILL THE REAR WHEEL HIT A ROCK CAUSING THE AXLE TO SNAP NEAR THE CONTACT POINT OF THE WHEEL. THIS CAUSED THE VEHICLE TO ROLL ONE AND A HALF TIMES ENDANGERING FOUR LIVES. THE AIR BAGS FAILED TO DEPLOY HOWEVER NONE WERE INJURED. THE CAR WAS DESTROYED AND NOT ABLE TO BE DRIVEN.