I got some really bad advice here...
Your suspension has worn and/or maladjusted parts. It needs a suspension tune-up. Follow the previously posted links on diagnosing, adjusting and repairing your steering and suspension. 
I doesn't cost anything to diagnose and adjust. If you find worn parts then you can invest in parts that will save you money in worn tires and other failures in the future.
By the way - The LAST jeep to see military service was the M151. The M151 was not a "Jeep" for 4 reasons:
1) It had horizontal rather than vertical grill slots. (a Jeep trademark from 1942)
2) They were never built by Willys. They were only build by Ford and AM General.
3) They all had FULLY INDEPENDENT SUSPENSION and a unibody (monocoque) chassis.
4) Because of number 3 above, an early design flaw made them susceptible to flipping (not off-road but on-road at speed) so all the ones owned by the US government were destroyed to avoid liability from the public.
That doesn't mean that all M151s were destroyed. Some were found in Canada and you might get one from Portugal. Their military still has many in service. If you find a restored one in the US that is listed as "reweld" it is because it was cut in 2 or 4 pieces by the government and welded back together by a restorer. More common than you would think.
http://www.youtube.com/watch?v=WeTDtb1u08g"]http://www.youtube.com/watch?v=WeTDtb1u08g

I doesn't cost anything to diagnose and adjust. If you find worn parts then you can invest in parts that will save you money in worn tires and other failures in the future.

By the way - The LAST jeep to see military service was the M151. The M151 was not a "Jeep" for 4 reasons:
1) It had horizontal rather than vertical grill slots. (a Jeep trademark from 1942)
2) They were never built by Willys. They were only build by Ford and AM General.
3) They all had FULLY INDEPENDENT SUSPENSION and a unibody (monocoque) chassis.
4) Because of number 3 above, an early design flaw made them susceptible to flipping (not off-road but on-road at speed) so all the ones owned by the US government were destroyed to avoid liability from the public.
That doesn't mean that all M151s were destroyed. Some were found in Canada and you might get one from Portugal. Their military still has many in service. If you find a restored one in the US that is listed as "reweld" it is because it was cut in 2 or 4 pieces by the government and welded back together by a restorer. More common than you would think.
http://www.youtube.com/watch?v=WeTDtb1u08g"]http://www.youtube.com/watch?v=WeTDtb1u08g
Last edited by Sahara Lee; Apr 22, 2014 at 06:39 PM.
I spoke to a Jeep salesman, and he assured me that its now different.


