general problems of the 2003 Jeep Laredo

I was going approx. 40 mph when I ran over a small bump in the road and the entire truck began to shake uncontrollably and I almost lost control. I applied the brakes and only when I slowed to approx. 10 mph it ceased. I have had it in the garage since Feb. 3, 2014 and have spent well over $3000 and it still isn't fixed. I have had the entire front end rebuilt and have replaced all the bushings in the rear end. I will never ever buy a Jeep again. I think it would be nice of them to reimburse some of the money I have spent over the last 3+ months. If I had to get a rental car, I would be in the poor house. I don't know what else to replace.