While you have it jacked up 
Grab the tire at the top and bottom and pull out on the bottom while you push in on the top 
 if it has any movement It usually the bearings bad 
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i thought that was ball joints
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also true 
Depending on where the movement is 
You can also use a prybar under the tire after you've jacked it up to help see what's worn out 
Every old truck I've ever seen needs balljoints and tie rod ends and a drag link suspension bushings and usually bearings too 
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