I am new to the Jeep family having bought my first Cherokee Sport a 2000 only about 2 months ago. Since buying it I have noticed that hitting a bump at speed (60 - 70mph) sometimes results in a shaking of the front end, I chalked this up to it being a used vehicle and didnt think much of it until two days ago on my way to work when I hit a bump on the freeway and it shook so violently I thought the wheels would fall off it did this for what probably was a full minute. Now Im scared to death driving it, until I can fix this problem, any suggestions to whats causing this would be appreciated.