Slotted nut won't stay put (On the Long Side)

[Mholme3 at aol.com]

I am at the end of my rope with this one.  The slotted nut on my left front strut insert will not stay tight no matter what.  I discovered a clunk from the spring about a week after I installed new springs/inserts.  Pulled the top nut and cover and sure enough the slotted nut had become VERY loose.  I dropped the assembly out from the fender, compressed the spring, retightened the nut to spec with the tool and reinstalled using the proper tools to keep the nut from loosening itself.  The next day, the clunk is back.  Removed the top nut/cover and the slotted nut had come loose once more.  I dropped the assembly yet again.  I inspected the bearing to make sure it spins freely and it does.  It was installed new with the springs/struts.  The thing won't stay put for more than a day.  I'm guessing that  while I am making turns with the car, the nut is coming loose for some reason.  Anyone else go through this?  It is only occuring on the driver side.  Did I get a faulty bearing?  Any help would be appreciated.

Marques
87 4kq