|Lower Control arm shaft problem.

[Hotrod1979]

Hello

I installed new (original) control arms and shafts on my truck. I have torqued down the end nuts of the lower control arms. But now when the spring is being compressed the one end nut is not turning with the control arm. So the end nut turns within the control arm...

This can't be good. When I loosen the nut, this problem is solved and the nut turns evenly with the control arm when compressing the spring. But then the nut is loose..

Anybody familiar with this problem. What can I do?