Tie rod on a ford 150 ,year 1999.replaced it, inner and outer and now a month later and it is loose again. Why?

Tie rod on a ford 150 , year 1999.replaced it, inner and outer and now a month later and it is loose again. Why?

Read more: Tie rod on a ford 150 ,year 1999.replaced it, inner and outer and now a month later and it is loose again. Why?