Tire Pressure Monitoring System problems of the 2007 Jeep Wrangler

Drive a 2007 4-door Wrangler. Within 6 months of purchase, hit a small bump going around 50 mph on highway. Car steering vibrated uncontrollably moving about 2-inches side to side. No shoulder available (caused other cars to swerve away from me) but after breaking, it eventually stopped. Asked dealer service workers (while it was being looked at for second recall for computer/breaks) why this was happening, they claimed "that is what Jeeps do". Happened 4 more times until a witness from the road pulled me over to tell me "he thought my right front wheel was going to come off. " Jeep claimed to have never heard of it before. (there are website about "death wobble" everywhere). Brought to dealer, fixed tie rod. Happened again, said it might be a bad tire. Will be at my expense. Called tire manufacturer, to start a file.