I agree! Its a reference to the problem mentioned here
http://www.4x4wire.com/forums/showf...B11&Number=975315&Forum=,f11,&Words=grinding&Searchpage=0&Limit=25&Main=975315&Search=true&where=bodysub&Name=&daterange=0&newerval=&newertype=&olderval=&oldertype=&bodyprev=#Post975315
which is still unresolved. I'm left having to assume that one (or both?) of the u-joints must be just on the edge of bad, so that w/ the small lift, angles have changed just enough to bring it out.
Only happens right at the transition point that gas is being applied or completely removed, as at high speeds (audible @>65 mph)... once torque fully transfered or releaved, it goes away.