I have a 2004 TJ and i just put new 33/12.50/15's on and had them balanced and i guess i got a front end alignment but not sure if it happened. When i go between 30mph and 40mph it really shakes violently. I have 3 inch coil spacers, but have not replaced the stock steering stabilizer and everything else is stock. What should i start to look at first any suggestions would be greatly appreciated thank you in advance.