'92 XJ Sport left front sound [with video] Help

[TheRedBull]

Metal/grinding sound coming from Left-front tire ONLY when wheel is turned to extent right going in reverse. CAN HEAR SOUND SLIGHTLY IN VIDEO AT 0:07 TO 0:11 Might have to play the video a few times to notice sound. 2 slideshow pics of underneath at the end.
[When wheel is turned to extent right going forward, no issue.]
Also ,I Looked underneath straightened positioned wheels - nothing unusual. Looked underneath when steering wheel turned to extreme right - nothing unusual.
Help, anyone??

http://www.youtube.com/watch?v=rmr6mizkxLA

[Punisher]

Its kinda hard to tell but I know I was having some problem with that and it was the dust cover rubbing the rotor so I bent it back a little and the problem was gone...

[TheRedBull]

No stuff?! ..Sweet I'll give that a try! Hope it helps. My older nephew [more advanced Xj Jeephead] says it could be possibly the axle u-joints.

[alwaysxj]

if it is the u joint. jack up that side and spine the tire and look at the joint if it has slop in it then replace. i could not really tell from the video sorry man.
but it is nice to see someone post a video of their problem then just try to explain it.