The front end may also have hit a pothole or big rock at 40 kmh.......front pivots take a severe hammering on a 4x4 ....so the careful amongst you might be advised to have your components crack tested at regular intervals......Ever had a front tyre on a truck blow out on the freeway,and headed into the lanes of oncoming traffic out of controll....When the dust clears ,youre in the weeds on the other side ,cars piled up all over the road.