What happen if I dont change my tie rod on a 4 wheeel drive vechiles?

Same as on a 2 wheel drive , they get loose to the point that they fall off and you lose your ability to steer the vehicle|||Your tires will go out of alignment and you will have terrible shaking any time you go over 20 MPH. It will also destroy your tires, rotors, breaks, etc.|||You will stand at the curb DUMBFOUNDED when it lets go and renders you parked.|||Excessive tire wear, poor steering control, possible wobble over pot holes and, oh yeah, if it fails and comes apart, the tire will quickly move to a perpendicular position relative to the to the vehicle - and, with the steering wheel no longer connected to the tire (as a lawyer might say), this may seriously compromise your ability to control the vehicle.