WHILE DRIVING THE CAR AT THE SPEED RANGE OF 40-70 MPH THE STEERING WHEEL UNDERGOES ABRUPT STIFFNESS CHANGE FROM STIFF TO VERY SOFT CAUSING SUDDEN JOLT OF THE VEHICLE RIGHT OR LEFT DEPENDING ON THE ROAD CONDITION. THIS HAPPENS ALL THE TIME AT THIS SPEED RANGE. LOST CONTROL RESULTING IN ALMOST CRASHING INTO A DIVIDE BARRIER. DRIVING REQUIRES MAINTAINING THE STEERING WHEEL IN STRONG GRIP AT ALL TIME AND A LOT OF EXPERIENCE TO AVOID LOSS OF CONTROL.