sure it could be bad at 81k or 8100. replace anything as needed and never expect anything to last as long as long as the manufacture says it should

 

gotcha

 

Hey bud save your self time and money do the test with the bar on the bottom like I explained in my 1st reply to check ball joints.I seened ball joints go out in 6 months and last a decade.

 

so i tested the ball joint with a real long steel bar..and nothing i found the problem tho...one tire in front was worn really really weird the center of the tread was in..the tire was kinda v-shaped..what was that tire like that..no other tire on the truck is like that..i tested the struts and they r not blown