need help lowering front diff

ive been reading post all day
i just installed a ready lift leveling kit
and like everybody else its got a low griding noise
like if you drive on the soulder on the highway
at low driving speed
the 4wd solves it
even tho my carrier bearing is worn it still wasnt doing this 2 days ago
the kit included 2 lowering diff spacers but these are for the front mounts
and all it does is tilt it forward did anybody acutally did the rear also
to drop the whole thing
thanks for any feedback
hi to all
great forum
will post pictures

matt

 

no the inner cv on driver side had this play prior to this
i noticed 3 month ago this was not normal compared to the r.s
and installed this lift couple days ago