Thanks for the repsonses guys. Tomorrow I'll jack up the rear end. I can get both ends in the air at the same time on jack stands if I take the wheels off. Then maybe I'll figure something out because I really can't believe there's something in the axle causing this but I sure can't see or feel by hand anything causing this.

2000 4Runner, OME 882 front coils w/ firm shocks, 891 rear coils w/ firm shocks, Sonoran Steel adjustable rear panhard bar, ARB Prado bullbar, Warn 9,000lb. winch, Amsteel synthetic winch line, Hella Lights, 265/75R16 BFG All Terrains