the rear of the car sways violently left and right when hitting a bump. I found a bad rear tie-rod and had it replaced. I've had 3 alignments in the last 8 weeks (lifetime alignment plan). They can find nothing wrong. I've been over every inch of the rear suspension (that's how > I < found the bad tie-rod when the big repair shop couldn't). Has anyone else had this problem and what was the solution? It is becoming dangerous to drive over 50 mph. Thanks...........Frank