OBY, Is this with the Fastrax spindles?
I was thinking that maybe the alum would cause the bushing to bind and unscrew the ballstud
As John Stranahan said, use thread lock and make sure that the bushings are OK (oh and make sure that nothing's bent)
A couple of weeks ago I couldn't screw a ball stud into my hub carrier and it kept on stripping the hole, that's when i found it was bent LOL
Make sure that the thread in the carrier is still there befroe you put it back together, I had that happen with the lower king pin/screw on my front spindle.
Anyone, do Street weapon rear CVDs fit on the XXX-S